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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">What explains gender inequalities in HIV/AIDS prevalence in sub-Saharan Africa? Evidence from the demographic and health surveys</title><author><name sortKey="Sia, Drissa" sort="Sia, Drissa" uniqKey="Sia D" first="Drissa" last="Sia">Drissa Sia</name><affiliation><nlm:aff id="Aff1">Département des sciences infirmières, Campus de Saint-Jérôme, Université du Québec en Outaouais, 5, rue Saint-Joseph, bureau J-3226, Saint Jérôme, Québec J7Z 0B7 Canada</nlm:aff></affiliation></author><author><name sortKey="Onadja, Yentema" sort="Onadja, Yentema" uniqKey="Onadja Y" first="Yentéma" last="Onadja">Yentéma Onadja</name><affiliation><nlm:aff id="Aff2">Institut Supérieur des Sciences de la Population (ISSP), Université Ouaga I Pr Joseph Ki-Zerbo, 03 BP 7118 Ouagadougou 03, Ouagadougou, Burkina Faso</nlm:aff></affiliation></author><author><name sortKey="Hajizadeh, Mohammad" sort="Hajizadeh, Mohammad" uniqKey="Hajizadeh M" first="Mohammad" last="Hajizadeh">Mohammad Hajizadeh</name><affiliation><nlm:aff id="Aff3">School of Health Administration, Dalhousie University, Halifax, Nova Scotia Canada</nlm:aff></affiliation></author><author><name sortKey="Heymann, S Jody" sort="Heymann, S Jody" uniqKey="Heymann S" first="S. Jody" last="Heymann">S. Jody Heymann</name><affiliation><nlm:aff id="Aff4">Fielding School of Public Health, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</nlm:aff></affiliation></author><author><name sortKey="Brewer, Timothy F" sort="Brewer, Timothy F" uniqKey="Brewer T" first="Timothy F." last="Brewer">Timothy F. Brewer</name><affiliation><nlm:aff id="Aff5">David Geffen School of Medicine, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</nlm:aff></affiliation></author><author><name sortKey="Nandi, Arijit" sort="Nandi, Arijit" uniqKey="Nandi A" first="Arijit" last="Nandi">Arijit Nandi</name><affiliation><nlm:aff id="Aff6">Institute for Health and Social Policy and Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Québec Canada</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27809824</idno><idno type="pmc">5095963</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5095963</idno><idno type="RBID">PMC:5095963</idno><idno type="doi">10.1186/s12889-016-3783-5</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000127</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000127</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">What explains gender inequalities in HIV/AIDS prevalence in sub-Saharan Africa? Evidence from the demographic and health surveys</title><author><name sortKey="Sia, Drissa" sort="Sia, Drissa" uniqKey="Sia D" first="Drissa" last="Sia">Drissa Sia</name><affiliation><nlm:aff id="Aff1">Département des sciences infirmières, Campus de Saint-Jérôme, Université du Québec en Outaouais, 5, rue Saint-Joseph, bureau J-3226, Saint Jérôme, Québec J7Z 0B7 Canada</nlm:aff></affiliation></author><author><name sortKey="Onadja, Yentema" sort="Onadja, Yentema" uniqKey="Onadja Y" first="Yentéma" last="Onadja">Yentéma Onadja</name><affiliation><nlm:aff id="Aff2">Institut Supérieur des Sciences de la Population (ISSP), Université Ouaga I Pr Joseph Ki-Zerbo, 03 BP 7118 Ouagadougou 03, Ouagadougou, Burkina Faso</nlm:aff></affiliation></author><author><name sortKey="Hajizadeh, Mohammad" sort="Hajizadeh, Mohammad" uniqKey="Hajizadeh M" first="Mohammad" last="Hajizadeh">Mohammad Hajizadeh</name><affiliation><nlm:aff id="Aff3">School of Health Administration, Dalhousie University, Halifax, Nova Scotia Canada</nlm:aff></affiliation></author><author><name sortKey="Heymann, S Jody" sort="Heymann, S Jody" uniqKey="Heymann S" first="S. Jody" last="Heymann">S. Jody Heymann</name><affiliation><nlm:aff id="Aff4">Fielding School of Public Health, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</nlm:aff></affiliation></author><author><name sortKey="Brewer, Timothy F" sort="Brewer, Timothy F" uniqKey="Brewer T" first="Timothy F." last="Brewer">Timothy F. Brewer</name><affiliation><nlm:aff id="Aff5">David Geffen School of Medicine, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</nlm:aff></affiliation></author><author><name sortKey="Nandi, Arijit" sort="Nandi, Arijit" uniqKey="Nandi A" first="Arijit" last="Nandi">Arijit Nandi</name><affiliation><nlm:aff id="Aff6">Institute for Health and Social Policy and Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Québec Canada</nlm:aff></affiliation></author></analytic><series><title level="j">BMC Public Health</title><idno type="eISSN">1471-2458</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Women are disproportionally affected by human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) in sub-Saharan Africa (SSA). The determinants of gender inequality in HIV/AIDS may vary across countries and require country-specific interventions to address them. This study aimed to identify the socio-demographic and behavioral characteristics underlying gender inequalities in HIV/AIDS in 21 SSA countries.</p></sec><sec><title>Methods</title><p>We applied an extension of the Blinder-Oaxaca decomposition approach to data from Demographic and Health Surveys and AIDS Indicator Surveys to quantify the differences in HIV/AIDS prevalence between women and men attributable to socio-demographic factors, sexual behaviours, and awareness of HIV/AIDS. We decomposed gender inequalities into two components: the percentage attributable to different levels of the risk factors between women and men (the “composition effect”) and the percentage attributable to risk factors having differential effects on HIV/AIDS prevalence in women and men (the “response effect”).</p></sec><sec><title>Results</title><p>Descriptive analyses showed that the difference between women and men in HIV/AIDS prevalence varied from a low of 0.68 % (<italic>P</italic> = 0.008) in Liberia to a high of 11.5 % (<italic>P</italic> < 0.001) in Swaziland. The decomposition analysis showed that 84 % (<italic>P</italic> < 0.001) and 92 % (<italic>P</italic> < 0.001) of the higher prevalence of HIV/AIDS among women in Uganda and Ghana, respectively, was explained by the different distributions of HIV/AIDS risk factors, particularly age at first sex between women and men. In the majority of countries, however, observed gender inequalities in HIV/AIDS were chiefly explained by differences in the responses to risk factors; the differential effects of age, marital status and occupation on prevalence of HIV/AIDS for women and men were among the significant contributors to this component. In Cameroon, Guinea, Malawi and Swaziland, a combination of the composition and response effects explained gender inequalities in HIV/AIDS prevalence.</p></sec><sec><title>Conclusions</title><p>The factors that explain gender inequality in HIV/AIDS in SSA vary by country, suggesting that country-specific interventions are needed. Unmeasured factors also contributed substantially to the difference in HIV/AIDS prevalence between women and men, highlighting the need for further study.</p></sec><sec><title>Electronic supplementary material</title><p>The online version of this article (doi:10.1186/s12889-016-3783-5) contains supplementary material, which is available to authorized users.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Magadi, Ma" uniqKey="Magadi M">MA Magadi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pettifor, Ae" uniqKey="Pettifor A">AE Pettifor</name></author><author><name sortKey="Rees, Hv" uniqKey="Rees H">HV Rees</name></author><author><name sortKey="Kleinschmidt, I" uniqKey="Kleinschmidt I">I Kleinschmidt</name></author><author><name sortKey="Steffenson, Ae" uniqKey="Steffenson A">AE Steffenson</name></author><author><name sortKey="Macphail, 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<front><journal-meta><journal-id journal-id-type="nlm-ta">BMC Public Health</journal-id><journal-id journal-id-type="iso-abbrev">BMC Public Health</journal-id><journal-title-group><journal-title>BMC Public Health</journal-title></journal-title-group><issn pub-type="epub">1471-2458</issn><publisher><publisher-name>BioMed Central</publisher-name><publisher-loc>London</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27809824</article-id><article-id pub-id-type="pmc">5095963</article-id><article-id pub-id-type="publisher-id">3783</article-id><article-id pub-id-type="doi">10.1186/s12889-016-3783-5</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title>What explains gender inequalities in HIV/AIDS prevalence in sub-Saharan Africa? Evidence from the demographic and health surveys</article-title></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">http://orcid.org/0000-0003-0044-8465</contrib-id><name><surname>Sia</surname><given-names>Drissa</given-names></name><address><email>drissa.sia@uqo.ca</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Onadja</surname><given-names>Yentéma</given-names></name><address><email>yonadja@issp.bf</email></address><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Hajizadeh</surname><given-names>Mohammad</given-names></name><address><email>m.hajizadeh@dal.ca</email></address><xref ref-type="aff" rid="Aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Heymann</surname><given-names>S. Jody</given-names></name><address><email>jody.heymann@ph.ucla.edu</email></address><xref ref-type="aff" rid="Aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Brewer</surname><given-names>Timothy F.</given-names></name><address><email>tbrewer@conet.ucla.edu</email></address><xref ref-type="aff" rid="Aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Nandi</surname><given-names>Arijit</given-names></name><address><email>arijit.nandi@mcgill.ca</email></address><xref ref-type="aff" rid="Aff6">6</xref></contrib><aff id="Aff1"><label>1</label>Département des sciences infirmières, Campus de Saint-Jérôme, Université du Québec en Outaouais, 5, rue Saint-Joseph, bureau J-3226, Saint Jérôme, Québec J7Z 0B7 Canada</aff><aff id="Aff2"><label>2</label>Institut Supérieur des Sciences de la Population (ISSP), Université Ouaga I Pr Joseph Ki-Zerbo, 03 BP 7118 Ouagadougou 03, Ouagadougou, Burkina Faso</aff><aff id="Aff3"><label>3</label>School of Health Administration, Dalhousie University, Halifax, Nova Scotia Canada</aff><aff id="Aff4"><label>4</label>Fielding School of Public Health, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</aff><aff id="Aff5"><label>5</label>David Geffen School of Medicine, The University of California, Los Angeles (UCLA), Los Angeles, CA USA</aff><aff id="Aff6"><label>6</label>Institute for Health and Social Policy and Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Québec Canada</aff></contrib-group><pub-date pub-type="epub"><day>3</day><month>11</month><year>2016</year></pub-date><pub-date pub-type="pmc-release"><day>3</day><month>11</month><year>2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>16</volume><elocation-id>1136</elocation-id><history><date date-type="received"><day>2</day><month>1</month><year>2016</year></date><date date-type="accepted"><day>19</day><month>10</month><year>2016</year></date></history><permissions><copyright-statement>© The Author(s). 2016</copyright-statement><license license-type="OpenAccess"><license-p><bold>Open Access</bold>This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/publicdomain/zero/1.0/">http://creativecommons.org/publicdomain/zero/1.0/</ext-link>) applies to the data made available in this article, unless otherwise stated.</license-p></license></permissions><abstract id="Abs1"><sec><title>Background</title><p>Women are disproportionally affected by human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) in sub-Saharan Africa (SSA). The determinants of gender inequality in HIV/AIDS may vary across countries and require country-specific interventions to address them. This study aimed to identify the socio-demographic and behavioral characteristics underlying gender inequalities in HIV/AIDS in 21 SSA countries.</p></sec><sec><title>Methods</title><p>We applied an extension of the Blinder-Oaxaca decomposition approach to data from Demographic and Health Surveys and AIDS Indicator Surveys to quantify the differences in HIV/AIDS prevalence between women and men attributable to socio-demographic factors, sexual behaviours, and awareness of HIV/AIDS. We decomposed gender inequalities into two components: the percentage attributable to different levels of the risk factors between women and men (the “composition effect”) and the percentage attributable to risk factors having differential effects on HIV/AIDS prevalence in women and men (the “response effect”).</p></sec><sec><title>Results</title><p>Descriptive analyses showed that the difference between women and men in HIV/AIDS prevalence varied from a low of 0.68 % (<italic>P</italic> = 0.008) in Liberia to a high of 11.5 % (<italic>P</italic> < 0.001) in Swaziland. The decomposition analysis showed that 84 % (<italic>P</italic> < 0.001) and 92 % (<italic>P</italic> < 0.001) of the higher prevalence of HIV/AIDS among women in Uganda and Ghana, respectively, was explained by the different distributions of HIV/AIDS risk factors, particularly age at first sex between women and men. In the majority of countries, however, observed gender inequalities in HIV/AIDS were chiefly explained by differences in the responses to risk factors; the differential effects of age, marital status and occupation on prevalence of HIV/AIDS for women and men were among the significant contributors to this component. In Cameroon, Guinea, Malawi and Swaziland, a combination of the composition and response effects explained gender inequalities in HIV/AIDS prevalence.</p></sec><sec><title>Conclusions</title><p>The factors that explain gender inequality in HIV/AIDS in SSA vary by country, suggesting that country-specific interventions are needed. Unmeasured factors also contributed substantially to the difference in HIV/AIDS prevalence between women and men, highlighting the need for further study.</p></sec><sec><title>Electronic supplementary material</title><p>The online version of this article (doi:10.1186/s12889-016-3783-5) contains supplementary material, which is available to authorized users.</p></sec></abstract><kwd-group xml:lang="en"><title>Keywords</title><kwd>Gender inequality</kwd><kwd>HIV/AIDS</kwd><kwd>Blinder-Oaxaca decomposition</kwd><kwd>Sub-Saharan Africa</kwd></kwd-group><custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name><meta-value>© The Author(s) 2016</meta-value></custom-meta></custom-meta-group></article-meta></front><body><sec id="Sec1"><title>Background</title><p>Countries in sub-Saharan Africa (SSA) remain the most severely affected by the human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) pandemic, accounting for 68 % of all persons living with HIV/AIDS worldwide [<xref ref-type="bibr" rid="CR1">1</xref>, <xref ref-type="bibr" rid="CR2">2</xref>]. Compared to men, women living in SSA are disproportionally affected by HIV/AIDS, accounting for 59 % of all infections in this region [<xref ref-type="bibr" rid="CR1">1</xref>–<xref ref-type="bibr" rid="CR3">3</xref>]. The gender disparity starts at a young age, with 15 to 24 year old women in SSA being more than twice as likely as men to become newly infected with HIV [<xref ref-type="bibr" rid="CR1">1</xref>, <xref ref-type="bibr" rid="CR2">2</xref>, <xref ref-type="bibr" rid="CR4">4</xref>]. There is an increasing recognition that prevention and treatment programs must address gender inequalities in HIV/AIDS [<xref ref-type="bibr" rid="CR5">5</xref>]. Nevertheless, the mechanisms that give rise to these inequalities are poorly understood.</p><p>Gender inequalities in HIV/AIDS might be attributable to the differential distribution of risk factors for women and men. For example, the lower socioeconomic position of women in SSA may place them at greater behavioural risk for HIV infection [<xref ref-type="bibr" rid="CR6">6</xref>–<xref ref-type="bibr" rid="CR8">8</xref>]. Women are more likely to be uneducated, unemployed, and impoverished than men, which predisposes them to transactional sexual exchanges [<xref ref-type="bibr" rid="CR9">9</xref>]. These sexual exchanges are often made with casual sex partners and without protection [<xref ref-type="bibr" rid="CR10">10</xref>]. Thus, economic inequality between women and men may increase vulnerability to HIV among sexually active women [<xref ref-type="bibr" rid="CR11">11</xref>]. Besides economic differences, unequal power relationships and the subordinate position of women relative to men also place women at higher risk for contracting HIV [<xref ref-type="bibr" rid="CR12">12</xref>–<xref ref-type="bibr" rid="CR18">18</xref>]. Women in SSA generally have less power to negotiate safe sex, including condom use [<xref ref-type="bibr" rid="CR19">19</xref>]. Additionally, cultural factors encouraging older men—who are more likely to be HIV-infected—to have younger female partners (i.e., intergenerational sex) [<xref ref-type="bibr" rid="CR20">20</xref>] limit women’s ability to negotiate safe sex and increase the risk of HIV infection for women relative to men potentially exacerbating gender inequalities in HIV infection [<xref ref-type="bibr" rid="CR21">21</xref>]. Moreover, social norms permitting violence against women, including domestic violence, spousal abuse, and rape might increase the probability of infection among women. This violence has many implications for the spread of HIV/AIDS. For example, it is associated with lack of condom use as well as traumatic injury among women in SSA [<xref ref-type="bibr" rid="CR19">19</xref>], which increases risk of HIV infection [<xref ref-type="bibr" rid="CR16">16</xref>, <xref ref-type="bibr" rid="CR22">22</xref>–<xref ref-type="bibr" rid="CR25">25</xref>].</p><p>The differential responses of women and men to HIV/AIDS risk factors may also contribute to observed gender inequalities in HIV/AIDS. For example, a recent study by Magadi [<xref ref-type="bibr" rid="CR3">3</xref>] using pooled data from 20 SSA countries showed that conditioning on HIV risk factors, including sexual behaviors, did not explain the increased odds of HIV/AIDS among women relative to men [<xref ref-type="bibr" rid="CR3">3</xref>], suggesting that traditional HIV risk factors may have differential and more detrimental effects for women compared to men. Few studies [<xref ref-type="bibr" rid="CR26">26</xref>, <xref ref-type="bibr" rid="CR27">27</xref>], however, have assessed whether risk factors have different effects on the probability of HIV/AIDS for men and women. One study showed that unmarried women have twice the risk of HIV compared to unmarried men [<xref ref-type="bibr" rid="CR28">28</xref>], suggesting that the differential effects of marital status may contribute to gender inequalities in HIV/AIDS. Additionally, although men and women may have similar distributions of household wealth, women have less control over household decision-making and financial resources and thereby may lack power to negotiate safe sexual practices (for example, condom use) with their partners [<xref ref-type="bibr" rid="CR9">9</xref>, <xref ref-type="bibr" rid="CR29">29</xref>, <xref ref-type="bibr" rid="CR30">30</xref>], which puts them at higher risk for HIV/AIDS. Unmeasured biological factors may also be important [<xref ref-type="bibr" rid="CR31">31</xref>]. For example, male-to-female transmission of HIV is more biologically efficient than female-to-male transmission [<xref ref-type="bibr" rid="CR32">32</xref>–<xref ref-type="bibr" rid="CR35">35</xref>]. However, gender inequalities in HIV/AIDS vary substantially across world regions and are unlikely to be explained by biological differences alone. Political, organizational and legislative [<xref ref-type="bibr" rid="CR5">5</xref>], social [<xref ref-type="bibr" rid="CR12">12</xref>–<xref ref-type="bibr" rid="CR18">18</xref>], and other cultural factors not already mentioned may also play important roles.</p><p>Gender inequalities in HIV/AIDS prevalence vary across countries [<xref ref-type="bibr" rid="CR36">36</xref>]. Clarifying the determinants of gender inequalities in the SSA region, including whether they are explained by the differential distributions (a “<italic>composition effect</italic>”) or effects (a “<italic>response effect</italic>”) of HIV/AIDS risk factors for women and men, may help to inform country-specific interventions for mitigating them [<xref ref-type="bibr" rid="CR37">37</xref>, <xref ref-type="bibr" rid="CR38">38</xref>]. However, the characteristics explaining gender inequalities in HIV/AIDS prevalence in this region have not been systematically evaluated. Using data from the Demographic and Health Surveys (DHS) and AIDS indicator surveys (AIS), we recently elucidated the factors explaining gender inequalities in HIV/AIDS prevalence in Kenya, Lesotho and Tanzania [<xref ref-type="bibr" rid="CR39">39</xref>]. This study showed that composition effects mainly explained gender inequalities in HIV/AIDS in Tanzania, whereas in Kenya and Lesotho they were partly explained by differences in the effects of measured HIV/AIDS risk factors for men and women, including socio-demographic characteristics (i.e., age and marital status) and sexual behaviours (i.e., age at first sex). In the current study, we extended our previous work by: 1) measuring the magnitude of the gender inequality in HIV/AIDS prevalence across 21 SSA countries using available DHS; 2) quantifying the extent to which gender inequalities in HIV/AIDS were attributable to composition or response effects using a decomposition analysis; and 3) estimating the contribution of each risk factor to gender inequalities in HIV/AIDS prevalence across SSA countries.</p></sec><sec id="Sec2"><title>Methods</title><sec id="Sec3"><title>Data</title><p>We used available data from the international DHS and the AIS to analyse the sources of gender inequality in HIV/AIDS prevalence across 21 SSA countries surveyed between 2003 and 2012 (Table <xref rid="Tab1" ref-type="table">1</xref>). Each DHS is a cross-sectional survey that collects and disseminates nationally representative household data, including comparable information on socio-demographic, behavioral, nutritional, health and other characteristics over time [<xref ref-type="bibr" rid="CR22">22</xref>, <xref ref-type="bibr" rid="CR40">40</xref>, <xref ref-type="bibr" rid="CR41">41</xref>]. The DHS uses a multistage stratified design with probabilistic sampling that gives a defined probability of selection to each elementary unit [<xref ref-type="bibr" rid="CR42">42</xref>]. Each DHS survey was stratified by urban and rural status and also by country-specific geographic or administrative regions [<xref ref-type="bibr" rid="CR43">43</xref>]. To ensure comparability across countries and time, the DHS uses standardized measurement tools and techniques and an identical core questionnaire that is pretested and then administered by trained interviewers [<xref ref-type="bibr" rid="CR44">44</xref>]. Further details concerning the DHS survey methodology are available elsewhere [<xref ref-type="bibr" rid="CR45">45</xref>].<table-wrap id="Tab1"><label>Table 1</label><caption><p>Response rates (%), samples size and prevalence of HIV/AIDS (%) by gender, country and survey year</p></caption><table frame="hsides" rules="groups"><thead><tr><th></th><th>Survey year</th><th colspan="2">Age range (years)</th><th>Response rates (%)<sup>a</sup></th><th colspan="3">Women</th><th colspan="3">Men</th><th colspan="2">Gender inequality in HIV/AIDS prevalence</th></tr><tr><th>Countries</th><th></th><th>Women</th><th>Men</th><th></th><th>n<sup>b</sup></th><th>HIV +<sup>c</sup></th><th>Prevalence1 (%)<sup>d</sup></th><th>n<sup>b</sup></th><th>HIV +<sup>c</sup></th><th>Prevalence (%)<sup>d</sup></th><th>Women-Men</th><th><italic>p</italic>-value<sup>e</sup></th></tr></thead><tbody><tr><td rowspan="2">Burkina Faso (BF)</td><td>2003</td><td>15–49</td><td>15–59</td><td>89</td><td>4189</td><td>84</td><td>1.82</td><td>3341</td><td>59</td><td>1.95</td><td>−0.13</td><td>0.713</td></tr><tr><td>2010</td><td>15–49</td><td>15–59</td><td>95</td><td>8346</td><td>100</td><td>1.18</td><td>7034</td><td>60</td><td>0.84</td><td>0.34</td><td>0.086</td></tr><tr><td rowspan="2">Cameroon (CM)</td><td>2004</td><td>15–49</td><td>15–59</td><td>91.34</td><td>5154</td><td>349</td><td>6.63</td><td>5041</td><td>203</td><td>3.92</td><td>2.71</td><td><0.001</td></tr><tr><td>2011</td><td>15–49</td><td>15–59</td><td>93</td><td>7253</td><td>434</td><td>5.57</td><td>6945</td><td>215</td><td>2.89</td><td>2.69</td><td><0.001</td></tr><tr><td>Congo Brazzaville (CG)</td><td>2009</td><td>15–49</td><td>15–49</td><td>97.6</td><td>6349</td><td>240</td><td>4.13</td><td>5760</td><td>134</td><td>2.06</td><td>2.07</td><td><0.001</td></tr><tr><td>Côte d’Ivoire (CI)</td><td>2005</td><td>15–49</td><td>15–49</td><td>78</td><td>4547</td><td>247</td><td>6.21</td><td>3917</td><td>110</td><td>3.11</td><td>3.1</td><td><0.001</td></tr><tr><td rowspan="2">Ethiopia (ET)</td><td>2005</td><td>15–49</td><td>15–59</td><td>79</td><td>5942</td><td>142</td><td>1.86</td><td>5107</td><td>70</td><td>0.91</td><td>0.95</td><td>0.003</td></tr><tr><td>2011</td><td>15–49</td><td>15–59</td><td>85.75</td><td>15505</td><td>358</td><td>1.86</td><td>12998</td><td>182</td><td>0.98</td><td>0.88</td><td><0.001</td></tr><tr><td>Ghana (GH)</td><td>2003</td><td>15–49</td><td>15–59</td><td>85</td><td>5289</td><td>138</td><td>2.71</td><td>4265</td><td>68</td><td>1.63</td><td>1.08</td><td><0.001</td></tr><tr><td>Guinea (GN)</td><td>2005</td><td>15–49</td><td>15–59</td><td>91</td><td>3842</td><td>68</td><td>1.89</td><td>2925</td><td>35</td><td>1.1</td><td>0.79</td><td>0.010</td></tr><tr><td>Liberia (LR)</td><td>2005</td><td>15–49</td><td>15–49</td><td>84</td><td>6482</td><td>147</td><td>1.91</td><td>5206</td><td>62</td><td>1.23</td><td>0.68</td><td>0.008</td></tr><tr><td rowspan="2">Malawi (MW)</td><td>2004</td><td>15–49</td><td>15–54</td><td>67</td><td>2864</td><td>421</td><td>13.32</td><td>2404</td><td>243</td><td>10.23</td><td>3.09</td><td>0.002</td></tr><tr><td>2010</td><td>15–49</td><td>15–54</td><td>87</td><td>7396</td><td>890</td><td>12.88</td><td>6509</td><td>530</td><td>8.39</td><td>4.5</td><td><0.001</td></tr><tr><td>Mali (ML)</td><td>2006</td><td>15–49</td><td>15–59</td><td>88</td><td>4743</td><td>69</td><td>1.54</td><td>3886</td><td>38</td><td>1.11</td><td>0.44</td><td>0.109</td></tr><tr><td>Mozambique (MZ)</td><td>2009</td><td>15–64</td><td>15–64</td><td>91</td><td>5901</td><td>875</td><td>12.67</td><td>4404</td><td>442</td><td>9.04</td><td>3.63</td><td><0.001</td></tr><tr><td>Niger (NE)</td><td>2006</td><td>15–49</td><td>15–59</td><td>88</td><td>4441</td><td>39</td><td>0.71</td><td>3232</td><td>33</td><td>0.71</td><td>0</td><td>0.974</td></tr><tr><td>D.R. Congo (CD)</td><td>2007</td><td>15–49</td><td>15–59</td><td>88</td><td>4632</td><td>81</td><td>1.62</td><td>4304</td><td>43</td><td>0.92</td><td>0.7</td><td>0.027</td></tr><tr><td rowspan="2">Rwanda (RW)</td><td>2005</td><td>15–49</td><td>15–59</td><td>96.5</td><td>5663</td><td>222</td><td>3.61</td><td>4728</td><td>115</td><td>2.2</td><td>1.41</td><td><0.001</td></tr><tr><td>2010</td><td>15–49</td><td>15–59</td><td>98</td><td>6952</td><td>266</td><td>3.71</td><td>6296</td><td>154</td><td>2.41</td><td>1.3</td><td><0.001</td></tr><tr><td>Sao Tome & Principe (ST)</td><td>2008/2009</td><td>15–49</td><td>15–59</td><td>--</td><td>2550</td><td>37</td><td>1.29</td><td>2160</td><td>39</td><td>1.8</td><td>−0.5</td><td>0.215</td></tr><tr><td rowspan="2">Senegal (SN)</td><td>2005</td><td>15–49</td><td>15–59</td><td>80</td><td>4466</td><td>48</td><td>0.88</td><td>3250</td><td>16</td><td>0.44</td><td>0.44</td><td>0.009</td></tr><tr><td>2011</td><td>15–49</td><td>15–59</td><td>80</td><td>5590</td><td>61</td><td>0.83</td><td>4327</td><td>32</td><td>0.51</td><td>0.32</td><td>0.071</td></tr><tr><td>Sierra Leone (SL)</td><td>2008</td><td>15–49</td><td>15–59</td><td>86</td><td>3466</td><td>64</td><td>1.73</td><td>3009</td><td>32</td><td>1.16</td><td>0.57</td><td>0.068</td></tr><tr><td>Swaziland (SZ)</td><td>2006/2007</td><td>15–49</td><td>15–49</td><td>85</td><td>4584</td><td>1438</td><td>31.15</td><td>3602</td><td>704</td><td>19.7</td><td>11.45</td><td><0.001</td></tr><tr><td>Uganda (UG)</td><td>2011</td><td>15–59</td><td>15–59</td><td>96</td><td>11967</td><td>944</td><td>8.21</td><td>9399</td><td>551</td><td>6.11</td><td>2.1</td><td><0.001</td></tr><tr><td>Zambia (ZM)</td><td>2007</td><td>15–49</td><td>15–59</td><td>75</td><td>5713</td><td>947</td><td>16.09</td><td>5161</td><td>649</td><td>12.29</td><td>3.8</td><td><0.001</td></tr><tr><td rowspan="2">Zimbabwe (ZW)</td><td>2005/2006</td><td>15–49</td><td>15–54</td><td>70</td><td>7494</td><td>1553</td><td>21.12</td><td>5555</td><td>782</td><td>14.75</td><td>6.37</td><td><0.001</td></tr><tr><td>2010/2011</td><td>15–49</td><td>15–54</td><td>75</td><td>7852</td><td>1463</td><td>17.71</td><td>6045</td><td>811</td><td>12.45</td><td>5.05</td><td><0.001</td></tr></tbody></table><table-wrap-foot><p><italic>Note</italic>: <italic>n</italic> sample size</p><p><sup>a</sup>More information on response rates is available at the following link: <ext-link ext-link-type="uri" xlink:href="http://www.measuredhs.com/What-We-Do/survey-search.cfm?pgtype=main&SrvyTp=country">http://www.measuredhs.com/What-We-Do/survey-search.cfm?pgtype=main&SrvyTp=country</ext-link></p><p><sup>b</sup>Numbers of women and men in the sample. These frequencies are unweighted numbers</p><p><sup>c</sup>Numbers of women and men with HIV positive test. These frequencies are unweighted numbers </p><p><sup>d</sup>A Weighted percentage of persons with HIV positive test among women and men using sampling weights provided by the DHS and AIS</p><p><sup>e</sup><italic>p</italic>-value based on Chi-squared test for the difference in HIV/AIDS prevalence between women and men</p></table-wrap-foot></table-wrap></p><p>The AIS has been fielded in selected low- and middle-income countries since 2001 [<xref ref-type="bibr" rid="CR3">3</xref>, <xref ref-type="bibr" rid="CR46">46</xref>]. Unlike sentinel surveillance, the AIS is a population-based survey that provides nationally-representative HIV prevalence data based on anonymous and voluntary testing of men and women aged 15–49 who were interviewed in the DHS, although some countries have also tested older adults [<xref ref-type="bibr" rid="CR47">47</xref>, <xref ref-type="bibr" rid="CR48">48</xref>]. Due to the anonymous nature of the survey, respondents cannot be provided with their results. However, all respondents are offered referrals for free voluntary counselling and testing (VCT) and AIDS educational materials. In some countries, mobile VCT teams follow up after interviewers to counsel and test respondents who agree to be tested. The comparative nature of the DHS and the possibility to link HIV status from the AIS to the full DHS survey data, while conserving anonymity, provide a unique opportunity to examine factors contributing to gender inequalities in HIV/AIDS in different contexts in Africa. Data from the standard DHS linked to HIV prevalence data from the AIS were available for 313,207 respondents across 21 countries, with seven countries surveyed twice between 2003 and 2012.</p><p>We used secondary data collected by the international Demographic and Health Survey (DHS) program after obtaining participants’ consent. Due to the anonymous nature of our data, our study was exempted from ethical committee review.</p></sec><sec id="Sec4"><title>Measures</title><p>Our outcome of interest was HIV serostatus, determined by a confirmatory HIV-positive antibody blood serum result. Sex of the respondent (male vs. female, as defined in the DHS and AIS), used as a proxy for gender, was the key explanatory variable. Other covariates included socio-demographic characteristics, sexual behaviours, and HIV/AIDS awareness. Socio-demographic characteristics included urban/rural residence, the sex of the household head, the respondent’s age at the time of survey, educational attainment (none, primary, or secondary and above), marital status (married, never married, or separated/divorced/widowed), and occupational type (agricultural, unemployed, domestic, trade, manual, office/service, or professional/manager). Applying a relative approach to poverty [<xref ref-type="bibr" rid="CR49">49</xref>–<xref ref-type="bibr" rid="CR51">51</xref>], household wealth was measured by a composite index created by principal component analysis (PCA) using information on household assets (ownership of radio, television, refrigerator, bicycle, motorcycle/scooter, car/truck, and telephone), housing quality, and environmental conditions (electricity, source of drinking water, type of toilet facility, floor material). The wealth index was split into country-specific quintiles. Sexual behaviors included age at first marriage, age at first sex, premarital sex, sexual behavior risk (i.e., if a condom was not used at last sexual intercourse or having intercourse with a partner other than a spouse), and having multiple sex partners in the past year. Following the approach of Magadi [<xref ref-type="bibr" rid="CR3">3</xref>], the PCA technique was employed to create a country-specific index of HIV/AIDS awareness using nine questions on knowledge of the modes of HIV transmission and ways to avoid infection.</p></sec><sec id="Sec5"><title>Statistical analysis</title><p>We calculated the prevalence of HIV/AIDS for women and men across countries. The Chi-square test was used to estimate gender inequalities in HIV/AIDS as the difference in prevalence comparing women to men. Then, in countries where gender was significantly associated with HIV/AIDS prevalence, we explored the sources of gender inequalities in HIV/AIDS prevalence using an extension of the Blinder-Oaxaca (BO) decomposition [<xref ref-type="bibr" rid="CR52">52</xref>, <xref ref-type="bibr" rid="CR53">53</xref>]. This involved decomposing the observed women-men gaps in the prevalence of HIV/AIDS into two components: composition and response effects. Composition effects represent the contribution to gender inequalities in HIV/AIDS prevalence due to gender differences in the distributions of observable HIV/AIDS risk factors between women and men (i.e., socio-demographic characteristics, sexual behaviors, and HIV/AIDS awareness). Response effects reflect the contribution to gender inequalities in HIV/AIDS due to gender differences in the effects of measured HIV/AIDS risk factors, as well as unmeasured factors not included in the model [<xref ref-type="bibr" rid="CR52">52</xref>–<xref ref-type="bibr" rid="CR54">54</xref>]. The percentage of gender inequality in HIV/AIDS explained by a given component for each risk factor is defined by the amount of the difference in HIV/AIDS prevalence explained by the component divided by the total difference in HIV/AIDS prevalence between women and men multiplied by 100. The BO method allowed us to assess which factors were associated with each source of inequality. Initially limited to continuous dependent variables, the BO decomposition approach has been extended to the case of non-linear dependent variables [<xref ref-type="bibr" rid="CR55">55</xref>–<xref ref-type="bibr" rid="CR59">59</xref>]. Estimates were obtained using the statistical routine designed for non-linear outcomes described by Powers, Yoshioka and Yun [<xref ref-type="bibr" rid="CR54">54</xref>]. This approach overcomes potential problems related to path dependence and identification [<xref ref-type="bibr" rid="CR54">54</xref>]. All analyses, both descriptive and multivariate, were weighted using the available DHS sampling weights and accounted for clustering at the household level. We used STATA version 12 software for all analyses.</p></sec></sec><sec id="Sec6"><title>Results</title><sec id="Sec7"><title>Gender inequalities in HIV/AIDS</title><p>Table <xref rid="Tab1" ref-type="table">1</xref> reports response rates, samples size and prevalence of HIV/AIDS by gender, country and survey year. Women had a significantly higher prevalence of HIV/AIDS than men in all countries and years sampled, apart from Burkina Faso in 2003 and 2010, Mali in 2006, Niger in 2006, Sao Tome & Principe in 2008/09, Senegal in 2011 and Sierra Leone in 2011. The absolute difference between women and men in HIV/AIDS prevalence ranged from a low of 0.68 % (<italic>P</italic> = 0.008) in Liberia (2005) to a high of 11.5 % (<italic>P</italic> < 0.001) in Swaziland (2006–7). Fig. <xref rid="Fig1" ref-type="fig">1</xref> maps gender inequalities in HIV/AIDS prevalence in 21 SSA countries (using the most recent survey for countries with more than one available); inequalities were more pronounced in the southeastern region of SSA relative to the northwestern region.<fig id="Fig1"><label>Fig. 1</label><caption><p>Gender inequalities in HIV/AIDS prevalence in SSA countries</p></caption><graphic xlink:href="12889_2016_3783_Fig1_HTML" id="MO1"></graphic></fig></p></sec><sec id="Sec8"><title>Sample characteristics</title><p>Descriptive analyses (Additional file <xref rid="MOESM1" ref-type="media">1</xref>: Table S1) showed that there were differences in the distributions of HIV/AIDS risk factors between women and men. On average, women were younger than men in all countries other than Mozambique, Swaziland, Liberia, Zimbabwe and Malawi, likely due to differences in the sampling frames for women and men, which ranged from 15 to 49 years for women and 15 to 64 years for men. In general, compared to men, women were more likely to be married (e.g., 76.7 % versus 63.8 % in Sierra Leone; 62.8 % versus 50 % in Cameroon) and to be separated/divorced/widowed (e.g., 9.1 % versus 5.4 % in Ghana; 18.4 % versus 5.5 % in Mozambique). However, there were some exceptions. For example, in Malawi the percentages of married women and married men were statistically similar. There was no difference between the percentages of separated/divorced/widowed women and men in Mali. In general, women were more socioeconomically disadvantaged than men. For example, compared to men, fewer women had secondary or above education (e.g., 11.1 % versus 31.9 % in Guinea; 25.3 % versus 36.6 % in Uganda). Additionally, women were more likely than men to be unemployed or employed in trading, whereas men were more likely to be employed in professional/managerial occupations. The descriptive statistics results also showed that a higher percentage of women reported first sexual intercourse before 16 years compared to men (e.g., 49.4 % versus 19.4 % in Guinea; 42.3 % versus 27.8 % in Côte d’Ivoire). With the exception of Swaziland, premarital sex was less common among women compared to men (e.g., 32.2 % versus 65.9 % in Malawi; 17.1 % versus 41.8 % in Rwanda). Women had lower levels of HIV/AIDS awareness compared to men, although this was not the case in all countries, for example in Swaziland.</p></sec><sec id="Sec9"><title>Explaining gender inequalities in HIV/AIDS prevalence</title><p>We used the BO decomposition technique to examine sources of gender inequality in HIV/AIDS prevalence across countries (Table <xref rid="Tab2" ref-type="table">2</xref>). There were three distinct patterns (Fig. <xref rid="Fig2" ref-type="fig">2</xref>). First, in the majority of countries, the response effect (the differential effect of a risk factor on women and men) explained the concentration of HIV/AIDS among women; the percentage of the gender inequality in HIV/AIDS attributable to this component ranged from 81.5 % in Mozambique and Rwanda to 116 % in Congo Brazzaville. These results indicate that, had responses to HIV/AIDS risk factors been equivalent for men and women, the prevalence of HIV/AIDS would have been 19 % lower among men relative to women in Mozambique and Rwanda and 16 % higher among men relative to women in Congo Brazzaville. Second, in Uganda and Ghana, the composition effect (i.e., difference in distribution; the differential distribution of risk factors by gender) explained 84 % and 92 % of the higher prevalence of HIV/AIDS for women compared to men, respectively. Third, in Cameroon, Guinea, Malawi and Swaziland, both response and composition effects explained gender inequalities in HIV/AIDS prevalence. More than one-half of the gender inequality in HIV/AIDS prevalence in these countries was attributable to gender differences in responses to socio-demographic characteristics, sexual behaviors, HIV⁄AIDS awareness, and unmeasured risk factors.<table-wrap id="Tab2"><label>Table 2</label><caption><p>Results from Blinder-Oaxaca decomposition analysis of gender inequalities in HIV/AIDS prevalence</p></caption><table frame="hsides" rules="groups"><thead><tr><th rowspan="2">Countries</th><th rowspan="2">Survey year</th><th rowspan="2">Gender inequality in HIV/AIDS prevalence (women-men)</th><th colspan="3">Composition effect<sup>f</sup></th><th colspan="3">Response effect<sup>g</sup></th></tr><tr><th>Beta (SE)</th><th><italic>p</italic>-value</th><th>Percent<sup>d</sup></th><th>Beta (SE)</th><th><italic>p</italic>-value</th><th>Percent<sup>e</sup></th></tr></thead><tbody><tr><td>Cameroon<sup>c</sup></td><td>2011</td><td char="." align="char">2.69</td><td>0.012 (0.004)</td><td char="." align="char">0.001</td><td char="." align="char">44.2</td><td>0.015 (0.005)</td><td char="." align="char">0.002</td><td char="." align="char">55.8</td></tr><tr><td>Congo Brazzaville<sup>a</sup></td><td>2009</td><td char="." align="char">2.07</td><td>−0.003 (0.005)</td><td char="." align="char">0.478</td><td char="." align="char">−15.6</td><td>0.024 (0.007)</td><td char="." align="char">0.000</td><td char="." align="char">115.6</td></tr><tr><td>Côte d’Ivoire<sup>a</sup></td><td>2005</td><td char="." align="char">3.10</td><td>0.005 (0.007)</td><td char="." align="char">0.514</td><td char="." align="char">16.2</td><td>0.024 (0.010)</td><td char="." align="char">0.013</td><td char="." align="char">83.8</td></tr><tr><td>Ethiopia<sup>a</sup></td><td>2011</td><td char="." align="char">0.88</td><td>0.001 (0.003)</td><td char="." align="char">0.698</td><td char="." align="char">13.3</td><td>0.007 (0.004)</td><td char="." align="char">0.039</td><td char="." align="char">86.7</td></tr><tr><td>Ghana<sup>b</sup></td><td>2003</td><td char="." align="char">1.08</td><td>0.01 (0.003)</td><td char="." align="char">0.000</td><td char="." align="char">91.9</td><td>0.001 (0.004)</td><td char="." align="char">0.811</td><td char="." align="char">8.1</td></tr><tr><td>Guinea<sup>c</sup></td><td>2005</td><td char="." align="char">0.79</td><td>−0.014 (0.007)</td><td char="." align="char">0.05</td><td char="." align="char">−176.5</td><td>0.023 (0.008)</td><td char="." align="char">0.006</td><td char="." align="char">276.5</td></tr><tr><td>Liberia</td><td>2007</td><td char="." align="char">0.68</td><td>−0.008 (0.008)</td><td char="." align="char">0.314</td><td char="." align="char">−111.1</td><td>0.014 (0.009)</td><td char="." align="char">0.094</td><td char="." align="char">211.1</td></tr><tr><td>Malawi<sup>c</sup></td><td>2010</td><td char="." align="char">4.50</td><td>0.022 (0.006)</td><td char="." align="char">0.000</td><td char="." align="char">48.8</td><td>0.023 (0.008)</td><td char="." align="char">0.006</td><td char="." align="char">51.2</td></tr><tr><td>Mozambique<sup>a</sup></td><td>2009</td><td char="." align="char">3.63</td><td>0.006 (0.011)</td><td char="." align="char">0.583</td><td char="." align="char">18.5</td><td>0.026 (0.013)</td><td char="." align="char">0.051</td><td char="." align="char">81.5</td></tr><tr><td>D.R. Congo</td><td>2007</td><td char="." align="char">0.70</td><td>−0.001 (0.004)</td><td char="." align="char">0.852</td><td char="." align="char">−10.6</td><td>0.008 (0.005)</td><td char="." align="char">0.106</td><td char="." align="char">110.6</td></tr><tr><td>Rwanda<sup>a</sup></td><td>2010</td><td char="." align="char">1.30</td><td>0.002 (0.004)</td><td char="." align="char">0.524</td><td char="." align="char">18.6</td><td>0.01 (0.005)</td><td char="." align="char">0.028</td><td char="." align="char">81.4</td></tr><tr><td>Swaziland<sup>c</sup></td><td>2006/07</td><td char="." align="char">11.45</td><td>0.021 (0.009)</td><td char="." align="char">0.015</td><td char="." align="char">18.7</td><td>0.093 (0.012)</td><td char="." align="char">0.000</td><td char="." align="char">81.3</td></tr><tr><td>Uganda<sup>b</sup></td><td>2011</td><td char="." align="char">2.10</td><td>0.018 (0.003)</td><td char="." align="char">0.000</td><td char="." align="char">83.7</td><td>0.003 (0.005)</td><td char="." align="char">0.476</td><td char="." align="char">16.3</td></tr><tr><td>Zambia<sup>a</sup></td><td>2007</td><td char="." align="char">3.80</td><td>0.005 (0.008)</td><td char="." align="char">0.522</td><td char="." align="char">13.9</td><td>0.031 (0.01)</td><td char="." align="char">0.003</td><td char="." align="char">86.1</td></tr><tr><td>Zimbabwe<sup>a</sup></td><td>2010/11</td><td char="." align="char">5.05</td><td>0.009 (0.007)</td><td char="." align="char">0.188</td><td char="." align="char">17.7</td><td>0.044 (0.010)</td><td char="." align="char">0.000</td><td char="." align="char">82.3</td></tr></tbody></table><table-wrap-foot><p><italic>Note</italic>: using this method, the net percent contribution of both components always equals to 100. A contribution may be negative (less than zero) or positive and can even exceed 100. A positive contribution indicates that the component contributes to the greater prevalence of HIV/AIDS among women relative to men, whereas a negative contribution indicates the opposite </p><p><italic>SE:</italic> Standard Error</p><p><sup>a</sup>Countries where the difference between men and women in the response to risk factors mainly explains the gender gap at <italic>p</italic>-value = 5 %</p><p><sup>b</sup>Countries where the difference in the distribution of risk factors between men and women mainly explains the gender gap at <italic>p</italic>-value = 5 %</p><p><sup>c</sup>Countries where difference in both the response to factors and the distribution of factors between men and women explains the gender gap at <italic>p-value </italic> = 5 %</p><p><sup>d</sup>Part of gender inequality in HIV/AIDS prevalence attributable to differences in the distribution of risk factors</p><p><sup>e</sup>Part of gender inequality in HIV/AIDS prevalence attributable to differences in the effects of risk factors</p><p><sup>f</sup>Represent the contribution to gender inequalities in HIV/AIDS prevalence due to gender differences in the distributions of observable HIV/AIDS risk factors between women and men</p><p><sup>g</sup>Reflect the contribution to gender inequalities in HIV/AIDS due to gender differences in the effects of measured HIV/AIDS risk factors, as well as unmeasured factors not included in the model</p></table-wrap-foot></table-wrap><fig id="Fig2"><label>Fig. 2</label><caption><p>Sources of gender inequalities in HIV/AIDS prevalence among SSA countries</p></caption><graphic xlink:href="12889_2016_3783_Fig2_HTML" id="MO2"></graphic></fig></p><p>Table <xref rid="Tab3" ref-type="table">3</xref> and Fig. <xref rid="Fig3" ref-type="fig">3</xref> report detailed results of the decomposition analysis conducted within each country. Gender inequalities in the majority of countries were explained by the differential effects of socio-demographic factors, including age, marital status, and occupation, on prevalence of HIV/AIDS for women and men. Women aged 20–39 were more likely to be HIV-infected than men of the same age group, particularly in Congo Brazzaville (2009), Zambia (2007), and Zimbabwe (2010–11). The increased prevalence of HIV/AIDS among unmarried women compared to unmarried men explained 16.1 % of the gender inequality in Côte d’Ivoire (2005), 43.1 % in Rwanda (2010), 67.4 % in Zambia (2007), and 75 % in Zimbabwe (2010–11). Additionally, the differential effects of occupational status, particularly work in agriculture, contributed to higher HIV/AIDS prevalence for women compared to men in Côte d’Ivoire (68.1 %), Ethiopia (50 %), Mozambique (43.8 %), and Rwanda (23.8 %). The constant term, which comprises the differential effects of factors not included in the model, was the largest contributor to gender inequalities in Congo Brazzaville.<table-wrap id="Tab3"><label>Table 3</label><caption><p>Contribution of HIV/AIDS risk factors to gender inequalities in HIV/AIDS prevalence by country; decomposition analysis using latest available DHS, 2003 to 2011</p></caption><table frame="hsides" rules="groups"><thead><tr><th></th><th>Ghana<sup>a</sup> 2003</th><th>Uganda 2011</th><th>Congo Brazzaville<sup>b</sup> 2009</th><th>Côte d’Ivoire<sup>a</sup> 2005</th><th>Ethiopia<sup>a</sup> 2011</th><th>Rwanda 2010</th><th>Zambia<sup>a</sup> 2007</th><th>Zimbabwe 2010/11</th><th>Mozambique<sup>c</sup> 2009</th><th>Cameroon 2011</th><th>Guinea<sup>a</sup> 2005</th><th>Malawi 2010</th><th>Swaziland<sup>a</sup> 2006/07</th><th>Liberia 2007</th><th>D.R. Congo<sup>d</sup> 2007</th></tr></thead><tbody><tr><td></td><td colspan="15">Absolute contribution<sup>e</sup> to gender inequalities in HIV/AIDS prevalence (<italic>p</italic>-value)</td></tr><tr><td>Gender Difference in HIV/AIDS Prevalence (%)</td><td>1.08</td><td>2.1</td><td>2.07</td><td>3.1</td><td>0.88</td><td>1.3</td><td>3.8</td><td>5.05</td><td>3.63</td><td>2.69</td><td>0.79</td><td>4.5</td><td>11.45</td><td>0.68</td><td>0.7</td></tr><tr><td><italic>The composition effect</italic><sup><italic>hg</italic></sup></td><td>0.99 (0.000)</td><td>1.76 (0.000)</td><td>−0.32 (0.478)</td><td>0.5 (0.514)</td><td>0.12 (0.698)</td><td>0.24 (0.524)</td><td>0.53 (0.480)</td><td>0.89 (0.188)</td><td>0.67 (0.583)</td><td>1.19 (0.001)</td><td>−1.39 (0.05)</td><td>2.20 (0.00)</td><td>2.14 (0.015)</td><td>−0.76 (0.314)</td><td>−0.07 (0.852)</td></tr><tr><td> Socio-economic and demographic characteristics</td><td>0.160</td><td>1.870</td><td>−0.320</td><td>0.750</td><td>0.160</td><td>−1.500</td><td>−2.44</td><td>0.830</td><td>0.660</td><td>0.720</td><td>0.040</td><td>1.920</td><td>0.440</td><td>0.030</td><td>0.110</td></tr><tr><td> Residence</td><td>0.000</td><td>0.040</td><td>0.000</td><td>−0.020</td><td>0.020</td><td>0.040</td><td>0.38</td><td>0.080</td><td>−0.360</td><td>0.020</td><td>−0.400</td><td>−0.120</td><td>−0.040</td><td>0.000</td><td>−0.040</td></tr><tr><td> Urban</td><td>0 (0.86)</td><td>0.02 (0.031)</td><td>0 (0.924)</td><td>−0.01 (0.391)</td><td>0.01 (0.604)</td><td>0.02 (0.831)</td><td>0.18 (0.943)</td><td>0.04 (0.013)</td><td>−0.18 (0.126)</td><td>0.01 (0.07)</td><td>−0.2 (0.026)</td><td>−0.06 (0.000)</td><td>−0.02 (0.018)</td><td>0 (0.799)</td><td>−0.02 (0.936)</td></tr><tr><td> Rural</td><td>0 (0.86)</td><td>0.02 (0.031)</td><td>0 (0.924)</td><td>−0.01 (0.391)</td><td>0.01 (0.604)</td><td>0.02 (0.831)</td><td>0.20 (0.943)</td><td>0.04 (0.013)</td><td>−0.18 (0.126)</td><td>0.01 (0.07)</td><td>−0.2 (0.026)</td><td>−0.06 (0.000)</td><td>−0.02 (0.018)</td><td>0 (0.799)</td><td>−0.02 (0.936)</td></tr><tr><td> Sex of household head</td><td>0.080</td><td>0.580</td><td>0.060</td><td>−0.040</td><td>0.040</td><td>−1.060</td><td>−0.78</td><td>0.300</td><td>2.020</td><td>0.340</td><td>0.140</td><td>0.740</td><td>−0.160</td><td>−0.020</td><td>−0.020</td></tr><tr><td> Male</td><td>0.04 (0.06)</td><td>0.29 (0.000)</td><td>0.03 (0.539)</td><td>−0.02 (0.538)</td><td>0.02 (0.654)</td><td>−0.53 (0.833)</td><td>−0.33 (0.943)</td><td>0.15 (0.168)</td><td>1.01 (0.122)</td><td>0.17 (0.007)</td><td>0.07 (0.065)</td><td>0.37 (0.004)</td><td>−0.08 (0.115)</td><td>−0.01 (0.474)</td><td>−0.01 (0.931)</td></tr><tr><td> Female</td><td>0.04 (0.06)</td><td>0.29 (0.000)</td><td>0.03 (0.539)</td><td>−0.02 (0.538)</td><td>0.02 (0.654)</td><td>−0.53 (0.833)</td><td>−0.39 (0.943)</td><td>0.15 (0.168)</td><td>1.01 (0.122)</td><td>0.17 (0.007)</td><td>0.07 (0.065)</td><td>0.37 (0.004)</td><td>−0.08 (0.115)</td><td>−0.01 (0.474)</td><td>−0.01 (0.931)</td></tr><tr><td> Age group</td><td>0.040</td><td>0.110</td><td>−0.130</td><td>−0.120</td><td>−0.010</td><td>−0.020</td><td>0.14</td><td>0.490</td><td>0.370</td><td>−0.010</td><td>−0.080</td><td>−0.180</td><td>0.470</td><td>−0.010</td><td>0.140</td></tr><tr><td> 15–19</td><td>0.02 (0.059)</td><td>0.06 (0.001)</td><td>−0.03 (0.176)</td><td>−0.07 (0.297)</td><td>−0.02 (0.619)</td><td>−0.05 (0.825)</td><td>0.15 (0.943)</td><td>0.42 (0.000)</td><td>0.06 (0.316)</td><td>−0.01 (0.054)</td><td>0.01 (0.138)</td><td>0.27 (0.006)</td><td>0.45 (0.002)</td><td>0 (0.988)</td><td>−0.01 (0.934)</td></tr><tr><td> 20–29</td><td>0.01 (0.409)</td><td>0.06 (0.026)</td><td>0.01 (0.738)</td><td>0 (0.985)</td><td>0.01 (0.644)</td><td>0.01 (0.894)</td><td>−0.11 (0.943)</td><td>0.01 (0.651)</td><td>0.2 (0.119)</td><td>0 (0.91)</td><td>−0.04 (0.506)</td><td>−0.28 (0.006)</td><td>0.01 (0.001)</td><td>0 (0.566)</td><td>0 (0.946)</td></tr><tr><td> 30–39</td><td>0.02 (0.007)</td><td>−0.02 (0.000)</td><td>−0.08 (0.183)</td><td>−0.03 (0.288)</td><td>0.01 (0.616)</td><td>−0.17 (0.828)</td><td>0.12 (0.943)</td><td>0.18 (0.000)</td><td>0.01 (0.215)</td><td>0.05 (0.009)</td><td>0.14 (0.089)</td><td>0.04 (0.000)</td><td>0.13 (0.002)</td><td>−0.01 (0.73)</td><td>−0.01 (0.934)</td></tr><tr><td> 40 +</td><td>−0.01 (0.65)</td><td>0.01 (0.801)</td><td>−0.03 (0.208)</td><td>−0.02 (0.313)</td><td>−0.01 (0.64)</td><td>0.19 (0.819)</td><td>−0.02 (0.951)</td><td>−0.12 (0.002)</td><td>0.1 (0.106)</td><td>−0.05 (0.515)</td><td>−0.19 (0.202)</td><td>−0.21 (0.006)</td><td>−0.12 (0.008)</td><td>0 (0.9)</td><td>0.16 (0.935)</td></tr><tr><td> Education level</td><td>−0.030</td><td>0.330</td><td>−0.040</td><td>0.030</td><td>−0.040</td><td>0.030</td><td>0.12</td><td>−0.100</td><td>−1.050</td><td>−0.210</td><td>−0.980</td><td>−0.360</td><td>−0.030</td><td>0.070</td><td>−0.090</td></tr><tr><td> None</td><td>−0.02 (0.14)</td><td>0.08 (0.182)</td><td>−0.01 (0.763)</td><td>−0.01 (0.931)</td><td>−0.03 (0.599)</td><td>0.01 (0.863)</td><td>0.17 (0.943)</td><td>−0.06 (0.029)</td><td>−0.7 (0.308)</td><td>−0.18 (0.148)</td><td>−0.58 (0.071)</td><td>−0.12 (0.333)</td><td>0.01 (0.103)</td><td>0.04 (0.577)</td><td>0.2 (0.935)</td></tr><tr><td> Primary</td><td>0 (0.24)</td><td>0.02 (0.011)</td><td>0 (0.983)</td><td>0 (0.548)</td><td>−0.01 (0.633)</td><td>0 (0.876)</td><td>−0.20 (0.943)</td><td>0.12 (0.053)</td><td>−0.17 (0.382)</td><td>0 (0.054)</td><td>−0.02 (0.648)</td><td>−0.01 (0.352)</td><td>−0.01 (0.123)</td><td>0 (0.829)</td><td>−0.17 (0.934)</td></tr><tr><td> Secondary and above</td><td>−0.01 (0.633)</td><td>0.23 (0.005)</td><td>−0.03 (0.674)</td><td>0.04 (0.68)</td><td>0 (0.683)</td><td>0.02 (0.848)</td><td>0.15 (0.943)</td><td>−0.16 (0.041)</td><td>−0.18 (0.548)</td><td>−0.03 (0.702)</td><td>−0.38 (0.163)</td><td>−0.23 (0.111)</td><td>−0.03 (0.006)</td><td>0.03 (0.651)</td><td>−0.12 (0.932)</td></tr><tr><td> Standard of living</td><td>−0.010</td><td>0.030</td><td>−0.050</td><td>0.030</td><td>0.000</td><td>0.130</td><td>0.28</td><td>−0.050</td><td>−0.060</td><td>−0.090</td><td>0.220</td><td>−0.070</td><td>0.010</td><td>−0.030</td><td>0.020</td></tr><tr><td> 1st Quintile</td><td>0 (0.816)</td><td>0 (0.061)</td><td>−0.02 (0.257)</td><td>0 (0.365)</td><td>0 (0.641)</td><td>0.09 (0.828)</td><td>0.10 (0.943)</td><td>0.02 (0.186)</td><td>−0.14 (0.144)</td><td>−0.04 (0.003)</td><td>0.04 (0.119)</td><td>−0.06 (0.253)</td><td>0.01 (0.354)</td><td>−0.02 (0.571)</td><td>0.02 (0.934)</td></tr><tr><td> 2nd Quintile</td><td>0 (0.626)</td><td>0.02 (0.071)</td><td>0 (0.52)</td><td>−0.01 (0.3)</td><td>0 (0.731)</td><td>−0.01 (0.873)</td><td>−0.01 (0.943)</td><td>0 (0.67)</td><td>0 (0.368)</td><td>−0.01 (0.043)</td><td>0.01 (0.647)</td><td>0 (0.612)</td><td>0 (0.412)</td><td>0 (0.901)</td><td>−0.02 (0.936)</td></tr><tr><td> 3rd Quintile</td><td>0 (0.814)</td><td>0.01 (0.009)</td><td>0 (0.868)</td><td>−0.01 (0.626)</td><td>0 (0.725)</td><td>0 (0.973)</td><td>0.09 (0.943)</td><td>0 (0.64)</td><td>0.05 (0.121)</td><td>0.01 (0.045)</td><td>0 (0.677)</td><td>0.01 (0.69)</td><td>0 (0.687)</td><td>0 (0.88)</td><td>0.01 (0.934)</td></tr><tr><td> 4th Quintile</td><td>0 (0.082)</td><td>0 (0.735)</td><td>−0.01 (0.3)</td><td>0 (0.406)</td><td>0 (0.642)</td><td>0.03 (0.834)</td><td>0.10 (0.943)</td><td>−0.02 (0.472)</td><td>0 (0.157)</td><td>−0.04 (0.02)</td><td>0.01 (0.371)</td><td>−0.01 (0.104)</td><td>0 (0.356)</td><td>−0.01 (0.541)</td><td>0 (0.997)</td></tr><tr><td> 5th Quintile</td><td>−0.01 (0.144)</td><td>0 (0.41)</td><td>−0.02 (0.255)</td><td>0.05 (0.336)</td><td>0 (0.678)</td><td>0.02 (0.846)</td><td>0 (0.952)</td><td>−0.05 (0.04)</td><td>0.03 (0.701)</td><td>−0.01 (0.051)</td><td>0.16 (0.062)</td><td>−0.01 (0.657)</td><td>0 (0.345)</td><td>0 (0.886)</td><td>0.01 (0.936)</td></tr><tr><td> Occupation type</td><td>0.040</td><td>−0.030</td><td>-</td><td>0.930</td><td>0.080</td><td>0.160</td><td>−1.00</td><td>−0.370</td><td>−2.200</td><td>0.110</td><td>0.360</td><td>−0.160</td><td>−0.070</td><td>0.150</td><td>0.360</td></tr><tr><td> Unemployed</td><td>0 (0.706)</td><td>−0.22 (0.031)</td><td>-</td><td>0.45 (0.283)</td><td>0.04 (0.661)</td><td>−0.11 (0.85)</td><td>−0.11 (0.950)</td><td>−0.02 (0.919)</td><td>-</td><td>−0.05 (0.781)</td><td>−0.37 (0.019)</td><td>−0.45 (0.124)</td><td>−0.05 (0.344)</td><td>−0.07 (0.619)</td><td>0.02 (0.936)</td></tr><tr><td> Agricultural</td><td>0.03 (0.143)</td><td>0.14 (0.209)</td><td>-</td><td>−0.74 (0.265)</td><td>0.02 (0.796)</td><td>0.16 (0.822)</td><td>−0.97 (0.943)</td><td>−0.04 (0.838)</td><td>−1.11 (0.213)</td><td>−0.01 (0.907)</td><td>0.02 (0.012)</td><td>0.24 (0.001)</td><td>−0.09 (0.077)</td><td>0.16 (0.45)</td><td>0.15 (0.935)</td></tr><tr><td> Domestic</td><td>-</td><td>0.02 (0.167)</td><td>-</td><td>-</td><td>-</td><td>0 (0.872)</td><td>-</td><td>0.03 (0.263)</td><td>0.02 (0.321)</td><td>0.01 (0.634)</td><td>-</td><td>0.02 (0.039)</td><td>-</td><td>0 (0.534)</td><td>-</td></tr><tr><td> Trade</td><td>0 (0.885)</td><td>−0.01 (0.79)</td><td>-</td><td>1.22 (0.291)</td><td>0.01 (0.705)</td><td>−0.01 (0.832)</td><td>−1.12 (0.940)</td><td>−0.06 (0.487)</td><td>−0.03 (0.571)</td><td>0.12 (0.198)</td><td>1.57 (0.006)</td><td>0.03 (0.763)</td><td>0.09 (0.039)</td><td>−0.03 (0.585)</td><td>-</td></tr><tr><td> Manual labor</td><td>0.02 (0.069)</td><td>0.05 (0.233)</td><td>-</td><td>−0.33 (0.265)</td><td>0 (0.6)</td><td>0.15 (0.81)</td><td>0.15 (0.943)</td><td>−0.32 (0.196)</td><td>−1.26 (0.051)</td><td>0 (0.987)</td><td>−0.78 (0.015)</td><td>0.1 (0.709)</td><td>−0.12 (0.192)</td><td>0.08 (0.51)</td><td>−0.03 (0.925)</td></tr><tr><td> Office/service</td><td>0.01 (0.276)</td><td>0.02 (0.57)</td><td>-</td><td>0.02 (0.287)</td><td>0 (0.669)</td><td>−0.05 (0.835)</td><td>0.08 (0.943)</td><td>0.02 (0.562)</td><td>0.28 (0.162)</td><td>−0.04 (0.104)</td><td>0.34 (0.008)</td><td>−0.18 (0.006)</td><td>0.01 (0.808)</td><td>0.01 (0.703)</td><td>0.01 (0.955)</td></tr><tr><td> Professional/manager</td><td>−0.02 (0.221)</td><td>−0.03 (0.665)</td><td>-</td><td>0.31 (0.258)</td><td>0.01 (0.61)</td><td>0.02 (0.844)</td><td>−0.03 (0.943)</td><td>0.02 (0.57)</td><td>−0.1 (0.567)</td><td>0.08 (0.414)</td><td>−0.42 (0.023)</td><td>0.08 (0.212)</td><td>0.09 (0.022)</td><td>0 (0.974)</td><td>0.21 (0.935)</td></tr><tr><td> Marital status</td><td>0.040</td><td>0.810</td><td>−0.160</td><td>−0.060</td><td>0.070</td><td>−0.780</td><td>−1.58</td><td>0.480</td><td>1.940</td><td>0.560</td><td>0.780</td><td>2.070</td><td>0.260</td><td>−0.130</td><td>−0.260</td></tr><tr><td> Never married</td><td>0.03 (0.151)</td><td>0.4 (0.000)</td><td>−0.08 (0.438)</td><td>0.03 (0.732)</td><td>0.04 (0.617)</td><td>−0.26 (0.829)</td><td>−0.90 (0.943)</td><td>0.38 (0.154)</td><td>0.75 (0.219)</td><td>0.54 (0.002)</td><td>0.65 (0.163)</td><td>1.36 (0.000)</td><td>0.33 (0.011)</td><td>−0.09 (0.471)</td><td>−0.21 (0.934)</td></tr><tr><td> Married</td><td>0 (0.986)</td><td>−0.05 (0.013)</td><td>−0.12 (0.18)</td><td>−0.11 (0.324)</td><td>0 (0.762)</td><td>−0.03 (0.832)</td><td>0.17 (0.943)</td><td>−0.6 (0.002)</td><td>0.04 (0.423)</td><td>−0.16 (0.131)</td><td>0.11 (0.679)</td><td>−0.07 (0.643)</td><td>−0.23 (0.008)</td><td>−0.02 (0.585)</td><td>0.02 (0.936)</td></tr><tr><td> Separated/divorced/widowed</td><td>0.01 (0.065)</td><td>0.46 (0.000)</td><td>0.04 (0.222)</td><td>0.02 (0.324)</td><td>0.03 (0.621)</td><td>−0.49 (0.829)</td><td>−0.85 (0.943)</td><td>0.7 (0.000)</td><td>1.15 (0.135)</td><td>0.18 (0.000)</td><td>0.02 (0.061)</td><td>0.78 (0.000)</td><td>0.16 (0.002)</td><td>−0.02 (0.461)</td><td>−0.07 (0.934)</td></tr><tr><td> Sexual behavior factors<sup>f</sup></td><td>0.800</td><td>−0.080</td><td>−0.060</td><td>−0.340</td><td>0.010</td><td>2.190</td><td>2.90</td><td>−0.170</td><td>−0.010</td><td>0.490</td><td>−1.240</td><td>0.120</td><td>1.700</td><td>−0.770</td><td>−0.140</td></tr><tr><td> Sexual behavior risk</td><td>0.000</td><td>0.000</td><td>0.000</td><td>0.000</td><td>0.000</td><td>0.120</td><td>0.00</td><td>0.000</td><td>0.100</td><td>0.000</td><td>−0.400</td><td>0.020</td><td>−0.040</td><td>−0.020</td><td>0.120</td></tr><tr><td> No</td><td>0 (0.406)</td><td>0 (0.255)</td><td>0 (0.599)</td><td>0 (0.876)</td><td>0 (0.612)</td><td>0.06 (0.825)</td><td>0.00 (0.977)</td><td>0 (0.838)</td><td>0.05 (0.448)</td><td>0 (0.001)</td><td>−0.2 (0.192)</td><td>0.01 (0.93)</td><td>−0.02 (0.163)</td><td>−0.01 (0.487)</td><td>0.06 (0.933)</td></tr><tr><td> Yes</td><td>0 (0.406)</td><td>0 (0.255)</td><td>0 (0.599)</td><td>0 (0.876)</td><td>0 (0.612)</td><td>0.06 (0.825)</td><td>0.00 (0.977)</td><td>0 (0.838)</td><td>0.05 (0.448)</td><td>0 (0.001)</td><td>−0.2 (0.192)</td><td>0.01 (0.93)</td><td>−0.02 (0.163)</td><td>−0.01 (0.487)</td><td>0.06 (0.933)</td></tr><tr><td> Premarital sex</td><td>−0.040</td><td>−0.360</td><td>0.040</td><td>−0.240</td><td>−0.020</td><td>1.440</td><td>2.85</td><td>−1.320</td><td>−0.040</td><td>−0.240</td><td>−1.320</td><td>−0.460</td><td>0.160</td><td>0.040</td><td>0.240</td></tr><tr><td> No</td><td>−0.02 (0.022)</td><td>−0.18 (0.007)</td><td>0.02 (0.543)</td><td>−0.12 (0.29)</td><td>−0.01 (0.606)</td><td>0.72 (0.821)</td><td>1.43 (0.943)</td><td>−0.66 (0.000)</td><td>−0.02 (0.948)</td><td>−0.12 (0.345)</td><td>−0.66 (0.042)</td><td>−0.23 (0.345)</td><td>0.08 (0.01)</td><td>0.02 (0.591)</td><td>0.12 (0.936)</td></tr><tr><td> Yes</td><td>−0.02 (0.022)</td><td>−0.18 (0.007)</td><td>0.02 (0.543)</td><td>−0.12 (0.29)</td><td>−0.01 (0.606)</td><td>0.72 (0.821)</td><td>1.42 (0.943)</td><td>−0.66 (0.000)</td><td>−0.02 (0.948)</td><td>−0.12 (0.345)</td><td>−0.66 (0.042)</td><td>−0.23 (0.345)</td><td>0.08 (0.01)</td><td>0.02 (0.591)</td><td>0.12 (0.936)</td></tr><tr><td> Multiple sex partners</td><td>0.020</td><td>−0.360</td><td>−0.020</td><td>0.000</td><td>−0.020</td><td>0.200</td><td>−0.06</td><td>−0.200</td><td>−0.440</td><td>0.200</td><td>−0.160</td><td>−0.280</td><td>−0.080</td><td>0.100</td><td>−0.540</td></tr><tr><td> No</td><td>0.01 (0.669)</td><td>−0.18 (0.003)</td><td>−0.01 (0.87)</td><td>0 (0.88)</td><td>−0.01 (0.607)</td><td>0.1 (0.825)</td><td>0.03 (0.942)</td><td>−0.1 (0.301)</td><td>−0.22 (0.437)</td><td>0.1 (0.385)</td><td>−0.08 (0.743)</td><td>−0.14 (0.403)</td><td>−0.04 (0.01)</td><td>0.05 (0.534)</td><td>−0.27 (0.933)</td></tr><tr><td> Yes</td><td>0.01 (0.669)</td><td>−0.18 (0.003)</td><td>−0.01 (0.87)</td><td>0 (0.88)</td><td>−0.01 (0.607)</td><td>0.1 (0.825)</td><td>0.03 (0.942)</td><td>−0.1 (0.301)</td><td>−0.22 (0.437)</td><td>0.1 (0.385)</td><td>−0.08 (0.743)</td><td>−0.14 (0.403)</td><td>−0.04 (0.01)</td><td>0.05 (0.534)</td><td>−0.27 (0.933)</td></tr><tr><td> Age at first sex</td><td>0.820</td><td>0.640</td><td>−0.080</td><td>−0.100</td><td>0.050</td><td>0.430</td><td>−0.01</td><td>1.350</td><td>0.370</td><td>0.530</td><td>0.640</td><td>0.840</td><td>1.660</td><td>−0.890</td><td>0.040</td></tr><tr><td> Never had sex</td><td>0.62 (0.000)</td><td>0.13 (0.118)</td><td>−0.03 (0.336)</td><td>0.08 (0.317)</td><td>0.03 (0.629)</td><td>0.4 (0.829)</td><td>−0.05 (0.943)</td><td>0.73 (0.000)</td><td>0.28 (0.136)</td><td>0.17 (0.052)</td><td>0.12 (0.426)</td><td>0.09 (0.069)</td><td>1.24 (0.004)</td><td>−0.74 (0.398)</td><td>0.02 (0.935)</td></tr><tr><td> < 16 years</td><td>0.23 (0.000)</td><td>0.27 (0.002)</td><td>−0.01 (0.633)</td><td>−0.02 (0.785)</td><td>0.03 (0.678)</td><td>0.18 (0.83)</td><td>−0.08 (0.943)</td><td>0.27 (0.000)</td><td>0.5 (0.16)</td><td>0.36 (0.001)</td><td>0.46 (0.341)</td><td>0.07 (0.002)</td><td>0.23 (0.015)</td><td>−0.56 (0.395)</td><td>0.06 (0.934)</td></tr><tr><td> 16–17</td><td>0.19 (0.000)</td><td>0.07 (0.089)</td><td>−0.03 (0.433)</td><td>0.03 (0.48)</td><td>0 (0.704)</td><td>−0.16 (0.83)</td><td>−0.22 (0.944)</td><td>0.31 (0.003)</td><td>0.09 (0.128)</td><td>0.07 (0.097)</td><td>0.06 (0.581)</td><td>0.41 (0.038)</td><td>0.27 (0.009)</td><td>−0.14 (0.393)</td><td>0.03 (0.936)</td></tr><tr><td> 18–19</td><td>0.06 (0.000)</td><td>−0.05 (0.028)</td><td>0.02 (0.293)</td><td>−0.07 (0.308)</td><td>0 (0.628)</td><td>−0.08 (0.83)</td><td>0.02 (0.943)</td><td>0.07 (0.017)</td><td>−0.34 (0.142)</td><td>0 (0.945)</td><td>−0.14 (0.294)</td><td>0.03 (0.307)</td><td>0.07 (0.015)</td><td>0.36 (0.403)</td><td>0 (0.944)</td></tr><tr><td> 20 +</td><td>−0.28 (0.000)</td><td>0.22 (0.058)</td><td>−0.03 (0.589)</td><td>−0.12 (0.285)</td><td>−0.01 (0.776)</td><td>0.09 (0.83)</td><td>0.32 (0.943)</td><td>−0.03 (0.823)</td><td>−0.16 (0.521)</td><td>−0.07 (0.665)</td><td>0.14 (0.79)</td><td>0.24 (0.317)</td><td>−0.15 (0.023)</td><td>0.19 (0.413)</td><td>−0.07 (0.934)</td></tr><tr><td> HIV⁄AIDS awareness</td><td>0.020</td><td>−0.020</td><td>0.050</td><td>0.050</td><td>−0.020</td><td>−0.450</td><td>0.08</td><td>0.270</td><td>0.000</td><td>−0.070</td><td>−0.170</td><td>0.170</td><td>−0.010</td><td>0.000</td><td>−0.050</td></tr><tr><td> Low</td><td>0.01 (0.36)</td><td>−0.01 (0.004)</td><td>0.02 (0.736)</td><td>0.03 (0.462)</td><td>−0.01 (0.642)</td><td>−0.15 (0.83)</td><td>0.04 (0.942)</td><td>0.12 (0.029)</td><td>−0.02 (0.474)</td><td>−0.09 (0.016)</td><td>−0.16 (0.245)</td><td>0.11 (0.003)</td><td>0 (0.809)</td><td>0 (0.846)</td><td>−0.01 (0.935)</td></tr><tr><td> Average</td><td>0 (0.178)</td><td>0 (0.809)</td><td>0 (0.85)</td><td>0 (0.917)</td><td>0 (0.715)</td><td>−0.02 (0.829)</td><td>0.00 (0.951)</td><td>−0.02 (0.564)</td><td>0 (0.241)</td><td>0.02 (0.469)</td><td>0 (0.263)</td><td>0.03 (0.06)</td><td>0 (0.937)</td><td>0 (0.578)</td><td>−0.03 (0.934)</td></tr><tr><td> High</td><td>0.01 (0.095)</td><td>−0.01 (0.002)</td><td>0.03 (0.621)</td><td>0.02 (0.475)</td><td>−0.01 (0.624)</td><td>−0.28 (0.828)</td><td>0.04 (0.943)</td><td>0.17 (0.021)</td><td>0.02 (0.423)</td><td>0 (0.001)</td><td>−0.01 (0.906)</td><td>0.03 (0.077)</td><td>−0.01 (0.745)</td><td>0 (0.591)</td><td>−0.01 (0.934)</td></tr><tr><td><italic>The response effect</italic><sup><italic>i</italic></sup></td><td>0.09 (0.811)</td><td>0.34 (0.476)</td><td>2.39 (0.000)</td><td>2.6 (0.013)</td><td>0.76 (0.039)</td><td>1.06 (0.028)</td><td>3.27 (0.002)</td><td>4.16 (0.000)</td><td>2.96 (0.051)</td><td>1.5 (0.002)</td><td>2.18 (0.006)</td><td>2.3 (0.006)</td><td>9.31 (0.000)</td><td>1.44 (0.094)</td><td>0.77 (0.106)</td></tr><tr><td> Socio-economic and demographic characteristics</td><td>0.020</td><td>−3.510</td><td>−0.360</td><td>5.470</td><td>0.090</td><td>0.390</td><td>−0.10</td><td>3.000</td><td>0.350</td><td>−0.930</td><td>−7.810</td><td>−0.020</td><td>3.620</td><td>6.220</td><td>−0.040</td></tr><tr><td> Residence</td><td>0.000</td><td>−0.100</td><td>−0.120</td><td>0.110</td><td>−0.120</td><td>0.060</td><td>−0.20</td><td>−0.180</td><td>0.260</td><td>0.010</td><td>−0.280</td><td>0.030</td><td>−0.060</td><td>−0.170</td><td>−0.020</td></tr><tr><td> Urban</td><td>0 (0.978)</td><td>0.03 (0.498)</td><td>−0.28 (0.432)</td><td>−0.84 (0.086)</td><td>0.04 (0.433)</td><td>−0.02 (0.708)</td><td>0.63 (0.077)</td><td>0.13 (0.599)</td><td>−0.22 (0.437)</td><td>0.06 (0.702)</td><td>0.42 (0.103)</td><td>−0.01 (0.909)</td><td>0.04 (0.825)</td><td>0.34 (0.453)</td><td>0.06 (0.646)</td></tr><tr><td> Rural</td><td>0 (0.978)</td><td>−0.13 (0.498)</td><td>0.16 (0.432)</td><td>0.95 (0.086)</td><td>−0.16 (0.433)</td><td>0.08 (0.708)</td><td>−0.83 (0.077)</td><td>−0.31 (0.599)</td><td>0.48 (0.437)</td><td>−0.05 (0.702)</td><td>−0.7 (0.103)</td><td>0.04 (0.909)</td><td>−0.1 (0.825)</td><td>−0.51 (0.453)</td><td>−0.08 (0.646)</td></tr><tr><td> Sex of household head</td><td>0.010</td><td>−0.060</td><td>−0.070</td><td>−0.440</td><td>−0.360</td><td>−0.120</td><td>−0.65</td><td>−0.080</td><td>−1.140</td><td>−0.320</td><td>0.450</td><td>−0.320</td><td>0.070</td><td>1.070</td><td>0.000</td></tr><tr><td> Male</td><td>0.01 (0.815)</td><td>−0.08 (0.554)</td><td>−0.08 (0.909)</td><td>−0.51 (0.553)</td><td>−0.42 (0.071)</td><td>−0.15 (0.599)</td><td>−0.75 (0.380)</td><td>−0.14 (0.746)</td><td>−1.28 (0.183)</td><td>−0.38 (0.19)</td><td>0.5 (0.254)</td><td>−0.38 (0.464)</td><td>0.16 (0.697)</td><td>1.41 (0.374)</td><td>0 (0.984)</td></tr><tr><td> Female</td><td>0 (0.815)</td><td>0.02 (0.554)</td><td>0.01 (0.909)</td><td>0.07 (0.553)</td><td>0.06 (0.071)</td><td>0.03 (0.599)</td><td>0.09 (0.380)</td><td>0.06 (0.746)</td><td>0.14 (0.183)</td><td>0.06 (0.19)</td><td>−0.05 (0.254)</td><td>0.06 (0.464)</td><td>−0.09 (0.697)</td><td>−0.34 (0.374)</td><td>0 (0.984)</td></tr><tr><td> Age group</td><td>0.000</td><td>0.010</td><td>0.320</td><td>0.100</td><td>0.010</td><td>0.080</td><td>0.31</td><td>0.800</td><td>−0.950</td><td>0.000</td><td>−0.040</td><td>0.180</td><td>2.830</td><td>0.170</td><td>0.090</td></tr><tr><td> 15–19</td><td>0 (0.871)</td><td>0.12 (0.417)</td><td>−0.14 (0.655)</td><td>0.17 (0.703)</td><td>0.08 (0.483)</td><td>0.2 (0.303)</td><td>−0.07 (0.877)</td><td>−0.49 (0.377)</td><td>0.64 (0.117)</td><td>0.44 (0.015)</td><td>−0.23 (0.371)</td><td>0.67 (0.046)</td><td>3.59 (0.000)</td><td>−0.63 (0.418)</td><td>−0.29 (0.063)</td></tr><tr><td> 20–29</td><td>−0.01 (0.813)</td><td>0.25 (0.355)</td><td>0.39 (0.159)</td><td>0.02 (0.963)</td><td>0.05 (0.619)</td><td>0.21 (0.249)</td><td>0.88 (0.021)</td><td>1.72 (0.000)</td><td>1.02 (0.092)</td><td>0.06 (0.694)</td><td>−0.01 (0.952)</td><td>0.1 (0.679)</td><td>1.32 (0.008)</td><td>0.04 (0.91)</td><td>0.11 (0.193)</td></tr><tr><td> 30–39</td><td>0 (0.821)</td><td>−0.1 (0.372)</td><td>0.34 (0.198)</td><td>0.13 (0.714)</td><td>−0.03 (0.6)</td><td>−0.04 (0.61)</td><td>0.27 (0.400)</td><td>0.32 (0.238)</td><td>−1.02 (0.031)</td><td>−0.22 (0.018)</td><td>0.35 (0.088)</td><td>−0.15 (0.348)</td><td>−0.97 (0.000)</td><td>0.37 (0.469)</td><td>0.01 (0.904)</td></tr><tr><td> 40 +</td><td>0.01 (0.814)</td><td>−0.26 (0.342)</td><td>−0.27 (0.045)</td><td>−0.22 (0.272)</td><td>−0.09 (0.214)</td><td>−0.29 (0.017)</td><td>−0.77 (0.009)</td><td>−0.75 (0.000)</td><td>−1.59 (0.008)</td><td>−0.28 (0.016)</td><td>−0.15 (0.557)</td><td>−0.44 (0.004)</td><td>−1.11 (0.000)</td><td>0.39 (0.417)</td><td>0.26 (0.102)</td></tr><tr><td> Education level</td><td>0.000</td><td>−0.050</td><td>−0.380</td><td>−0.220</td><td>−0.040</td><td>0.000</td><td>−0.31</td><td>1.170</td><td>0.040</td><td>−0.390</td><td>−0.480</td><td>0.010</td><td>−0.690</td><td>0.130</td><td>0.180</td></tr><tr><td> None</td><td>0 (0.814)</td><td>0.01 (0.533)</td><td>0.01 (0.613)</td><td>0.27 (0.454)</td><td>−0.1 (0.29)</td><td>−0.03 (0.55)</td><td>0.03 (0.717)</td><td>−0.02 (0.424)</td><td>−0.25 (0.346)</td><td>0.08 (0.229)</td><td>−0.87 (0.034)</td><td>−0.04 (0.449)</td><td>0.08 (0.348)</td><td>−0.12 (0.574)</td><td>−0.05 (0.187)</td></tr><tr><td> Primary</td><td>0 (0.816)</td><td>0.04 (0.705)</td><td>−0.05 (0.759)</td><td>0.28 (0.293)</td><td>0.02 (0.823)</td><td>−0.03 (0.884)</td><td>0.24 (0.620)</td><td>0.29 (0.456)</td><td>−0.16 (0.855)</td><td>0 (0.974)</td><td>0.16 (0.227)</td><td>−0.26 (0.419)</td><td>0.26 (0.365)</td><td>0.19 (0.58)</td><td>0.2 (0.145)</td></tr><tr><td> Secondary and above</td><td>0 (0.899)</td><td>−0.1 (0.453)</td><td>−0.34 (0.581)</td><td>−0.77 (0.119)</td><td>0.04 (0.344)</td><td>0.06 (0.519)</td><td>−0.58 (0.318)</td><td>0.9 (0.46)</td><td>0.45 (0.278)</td><td>−0.47 (0.084)</td><td>0.23 (0.262)</td><td>0.31 (0.203)</td><td>−1.03 (0.041)</td><td>0.06 (0.886)</td><td>0.03 (0.849)</td></tr><tr><td> Standard of living</td><td>0.000</td><td>0.020</td><td>0.460</td><td>0.510</td><td>0.010</td><td>−0.080</td><td>0.130</td><td>0.060</td><td>−0.310</td><td>0.000</td><td>−0.140</td><td>0.020</td><td>−0.150</td><td>0.130</td><td>−0.360</td></tr><tr><td> 1st Quintile</td><td>0 (0.985)</td><td>0.01 (0.828)</td><td>−0.15 (0.115)</td><td>−0.52 (0.082)</td><td>−0.08 (0.483)</td><td>−0.15 (0.178)</td><td>0.36 (0.281)</td><td>−0.12 (0.585)</td><td>−0.27 (0.608)</td><td>−0.03 (0.789)</td><td>0.16 (0.37)</td><td>0.17 (0.252)</td><td>−0.41 (0.091)</td><td>−0.16 (0.673)</td><td>−0.62 (0.086)</td></tr><tr><td> 2nd Quintile</td><td>0 (0.822)</td><td>−0.07 (0.4)</td><td>−0.09 (0.383)</td><td>−0.34 (0.141)</td><td>0.09 (0.443)</td><td>−0.1 (0.247)</td><td>−0.06 (0.742)</td><td>0.04 (0.848)</td><td>−0.69 (0.098)</td><td>−0.08 (0.331)</td><td>0.01 (0.941)</td><td>−0.02 (0.85)</td><td>−0.12 (0.511)</td><td>−0.04 (0.864)</td><td>−0.62 (0.065)</td></tr><tr><td> 3rd Quintile</td><td>0 (0.818)</td><td>0.03 (0.539)</td><td>0 (0.974)</td><td>0.16 (0.594)</td><td>0 (0.952)</td><td>−0.03 (0.743)</td><td>−0.17 (0.396)</td><td>0.27 (0.261)</td><td>0.47 (0.135)</td><td>0.13 (0.094)</td><td>0.13 (0.388)</td><td>−0.06 (0.665)</td><td>−0.01 (0.98)</td><td>−0.02 (0.899)</td><td>−0.68 (0.057)</td></tr><tr><td> 4th Quintile</td><td>0.000 (0.828)</td><td>0.02 (0.634)</td><td>0.27 (0.218)</td><td>0.000 (0.999)</td><td>−0.01 (0.766)</td><td>0.11 (0.165)</td><td>−0.01 (0.946)</td><td>0.14 (0.571)</td><td>0.18 (0.411)</td><td>0.07 (0.524)</td><td>−0.02 (0.839)</td><td>−0.09 (0.427)</td><td>−0.28 (0.223)</td><td>0.44 (0.425)</td><td>0.72 (0.05)</td></tr><tr><td> 5th Quintile</td><td>0.000 (0.842)</td><td>0.03 (0.616)</td><td>0.43 (0.133)</td><td>1.21 (0.026)</td><td>0.01 (0.762)</td><td>0.09 (0.289)</td><td>0.01 (0.980)</td><td>−0.27 (0.277)</td><td>0 (0.998)</td><td>−0.09 (0.39)</td><td>−0.42 (0.107)</td><td>0.02 (0.926)</td><td>0.67 (0.011)</td><td>−0.09 (0.635)</td><td>0.84 (0.055)</td></tr><tr><td> Occupation type</td><td>0.010</td><td>−3.280</td><td></td><td>4.970</td><td>0.450</td><td>0.260</td><td>0.010</td><td>0.270</td><td>2.470</td><td>0.010</td><td>−0.430</td><td>−0.020</td><td>0.000</td><td>5.260</td><td>0.150</td></tr><tr><td> Unemployed</td><td>0 (0.849)</td><td>−0.61 (0.349)</td><td>-</td><td>1.79 (0.035)</td><td>0.06 (0.183)</td><td>−0.04 (0.518)</td><td>0.04 (0.901)</td><td>−0.35 (0.368)</td><td>-</td><td>−0.08 (0.571)</td><td>0.27 (0.319)</td><td>−0.07 (0.633)</td><td>−0.04 (0.937)</td><td>1.23 (0.311)</td><td>−0.04 (0.71)</td></tr><tr><td> Agricultural</td><td>0.01 (0.814)</td><td>−0.72 (0.346)</td><td>-</td><td>2.11 (0.037)</td><td>0.44 (0.131)</td><td>0.31 (0.339)</td><td>−0.23 (0.666)</td><td>0.02 (0.944)</td><td>1.59 (0.148)</td><td>−0.02 (0.898)</td><td>−0.29 (0.403)</td><td>−0.21 (0.554)</td><td>0.07 (0.628)</td><td>3.16 (0.365)</td><td>0.19 (0.202)</td></tr><tr><td> Domestic</td><td>-</td><td>0.09 (0.346)</td><td>-</td><td>-</td><td>-</td><td>0.02 (0.586)</td><td>-</td><td>−0.06 (0.176)</td><td>−0.06 (0.368)</td><td>−0.05 (0.143)</td><td>-</td><td>0 (0.823)</td><td>-</td><td>−0.05 (0.342)</td><td>-</td></tr><tr><td> Trade</td><td>0 (0.818)</td><td>−0.26 (0.348)</td><td>-</td><td>0.47 (0.052)</td><td>−0.03 (0.313)</td><td>0.08 (0.077)</td><td>0.24 (0.129)</td><td>0.14 (0.227)</td><td>0.61 (0.061)</td><td>0.05 (0.427)</td><td>−0.19 (0.017)</td><td>0.23 (0.042)</td><td>0.07 (0.403)</td><td>0.24 (0.439)</td><td>-</td></tr><tr><td> Manual labor</td><td>0 (0.813)</td><td>−1.36 (0.346)</td><td>-</td><td>0 (0.999)</td><td>0.03 (0.368)</td><td>−0.07 (0.57)</td><td>0.04 (0.869)</td><td>0.38 (0.309)</td><td>0.53 (0.315)</td><td>0.03 (0.861)</td><td>−0.15 (0.204)</td><td>0.06 (0.76)</td><td>0.04 (0.872)</td><td>0.14 (0.527)</td><td>0.06 (0.47)</td></tr><tr><td> Office/service</td><td>0 (0.815)</td><td>−0.21 (0.352)</td><td>-</td><td>1 (0.025)</td><td>−0.01 (0.253)</td><td>−0.04 (0.092)</td><td>−0.12 (0.135)</td><td>−0.08 (0.228)</td><td>−0.19 (0.294)</td><td>0.12 (0.029)</td><td>0.05 (0.003)</td><td>0.02 (0.736)</td><td>0.01 (0.966)</td><td>0.34 (0.38)</td><td>−0.06 (0.122)</td></tr><tr><td> Professional/manager</td><td>0 (0.819)</td><td>−0.21 (0.346)</td><td>-</td><td>−0.4 (0.015)</td><td>−0.04 (0.126)</td><td>0 (0.851)</td><td>0.04 (0.740)</td><td>0.22 (0.059)</td><td>−0.01 (0.953)</td><td>−0.04 (0.435)</td><td>−0.12 (0.068)</td><td>−0.05 (0.32)</td><td>−0.15 (0.308)</td><td>0.2 (0.43)</td><td>0 (0.946)</td></tr><tr><td> Marital status</td><td>0.000</td><td>−0.050</td><td>−0.570</td><td>0.440</td><td>0.140</td><td>0.190</td><td>0.630</td><td>0.960</td><td>−0.020</td><td>−0.240</td><td>−6.890</td><td>0.080</td><td>1.620</td><td>−0.370</td><td>−0.080</td></tr><tr><td> Never married</td><td>0 (0.825)</td><td>0.13 (0.465)</td><td>0.25 (0.473)</td><td>0.5 (0.532)</td><td>0.02 (0.868)</td><td>0.56 (0.095)</td><td>2.18 (0.002)</td><td>3.79 (0.000)</td><td>0.25 (0.569)</td><td>0.04 (0.851)</td><td>−2.7 (0.004)</td><td>0.73 (0.175)</td><td>2.6 (0.001)</td><td>1.17 (0.389)</td><td>−0.01 (0.954)</td></tr><tr><td> Married</td><td>0 (0.821)</td><td>−0.17 (0.424)</td><td>−0.92 (0.015)</td><td>0 (0.995)</td><td>0.13 (0.401)</td><td>−0.36 (0.162)</td><td>−1.39 (0.036)</td><td>−2.68 (0.000)</td><td>−0.2 (0.885)</td><td>−0.3 (0.168)</td><td>−4.76 (0.001)</td><td>−0.62 (0.216)</td><td>−0.96 (0.001)</td><td>−1.51 (0.395)</td><td>−0.08 (0.614)</td></tr><tr><td> Separated/divorced/widowed</td><td>0 (0.885)</td><td>−0.01 (0.717)</td><td>0.1 (0.091)</td><td>−0.06 (0.456)</td><td>−0.01 (0.272)</td><td>−0.01 (0.272)</td><td>−0.17 (0.009)</td><td>−0.15 (0.004)</td><td>−0.07 (0.46)</td><td>0.02 (0.318)</td><td>0.57 (0.001)</td><td>−0.03 (0.33)</td><td>−0.02 (0.631)</td><td>−0.03 (0.679)</td><td>0.01 (0.674)</td></tr><tr><td> Sexual behavioral factors<sup>f</sup></td><td>0.030</td><td>0.200</td><td>0.200</td><td>−0.640</td><td>0.440</td><td>−0.490</td><td>1.47</td><td>1.320</td><td>0.960</td><td>−0.650</td><td>0.330</td><td>−0.120</td><td>0.490</td><td>−2.550</td><td>−0.190</td></tr><tr><td> Sexual behavior risk</td><td>0.020</td><td>0.180</td><td>−0.020</td><td>−0.850</td><td>0.700</td><td>−0.120</td><td>−0.320</td><td>1.880</td><td>−0.240</td><td>−0.520</td><td>−0.120</td><td>−0.990</td><td>1.160</td><td>0.000</td><td>−0.250</td></tr><tr><td> No</td><td>0.02 (0.813)</td><td>0.21 (0.436)</td><td>0.08 (0.65)</td><td>−1.12 (0.183)</td><td>0.72 (0.066)</td><td>−0.12 (0.858)</td><td>−0.36 (0.703)</td><td>1.98 (0.081)</td><td>−0.3 (0.743)</td><td>−0.64 (0.019)</td><td>−0.15 (0.772)</td><td>−1.13 (0.1)</td><td>1.4 (0.015)</td><td>0 (0.99)</td><td>−0.36 (0.18)</td></tr><tr><td> Yes</td><td>0 (0.813)</td><td>−0.03 (0.436)</td><td>−0.1 (0.65)</td><td>0.27 (0.183)</td><td>−0.02 (0.066)</td><td>0 (0.858)</td><td>0.04 (0.703)</td><td>−0.1 (0.081)</td><td>0.06 (0.743)</td><td>0.12 (0.019)</td><td>0.03 (0.772)</td><td>0.14 (0.1)</td><td>−0.24 (0.015)</td><td>0 (0.99)</td><td>0.11 (0.18)</td></tr><tr><td> Premarital sex</td><td>0.000</td><td>0.070</td><td>0.290</td><td>−0.130</td><td>0.010</td><td>0.080</td><td>−0.010</td><td>0.000</td><td>−0.590</td><td>−0.210</td><td>0.090</td><td>−0.010</td><td>−0.010</td><td>−0.170</td><td>−0.080</td></tr><tr><td> No</td><td>0.000 (0.822)</td><td>−0.08 (0.419)</td><td>−0.06 (0.424)</td><td>0.06 (0.801)</td><td>0.01 (0.899)</td><td>0.27 (0.086)</td><td>0.01 (0.976)</td><td>−0.03 (0.927)</td><td>0.58 (0.112)</td><td>0.2 (0.08)</td><td>−0.07 (0.615)</td><td>0.000 (0.979)</td><td>0.01 (0.971)</td><td>0.06 (0.712)</td><td>0.05 (0.412)</td></tr><tr><td> Yes</td><td>0.000 (0.822)</td><td>0.15 (0.419)</td><td>0.35 (0.424)</td><td>−0.19 (0.801)</td><td>0 (0.899)</td><td>−0.19 (0.086)</td><td>−0.02 (0.976)</td><td>0.03 (0.927)</td><td>−1.17 (0.112)</td><td>−0.41 (0.08)</td><td>0.16 (0.615)</td><td>−0.01 (0.979)</td><td>−0.02 (0.971)</td><td>−0.23 (0.712)</td><td>−0.13 (0.412)</td></tr><tr><td> Multiple sex partners</td><td>−0.010</td><td>−0.080</td><td>−0.070</td><td>0.020</td><td>−0.440</td><td>0.080</td><td>0.600</td><td>0.170</td><td>−0.040</td><td>0.050</td><td>0.140</td><td>0.510</td><td>0.130</td><td>0.160</td><td>0.200</td></tr><tr><td> No</td><td>−0.01 (0.81)</td><td>−0.12 (0.53)</td><td>0.46 (0.022)</td><td>0.62 (0.136)</td><td>−0.46 (0.116)</td><td>0.09 (0.756)</td><td>0.96 (0.104)</td><td>0.24 (0.69)</td><td>−0.07 (0.935)</td><td>0.17 (0.308)</td><td>0.3 (0.431)</td><td>0.68 (0.15)</td><td>0.27 (0.551)</td><td>0.73 (0.422)</td><td>0.35 (0.133)</td></tr><tr><td> Yes</td><td>0 (0.81)</td><td>0.04 (0.53)</td><td>−0.53 (0.022)</td><td>−0.6 (0.136)</td><td>0.02 (0.116)</td><td>−0.01 (0.756)</td><td>−0.36 (0.104)</td><td>−0.07 (0.69)</td><td>0.03 (0.935)</td><td>−0.12 (0.308)</td><td>−0.16 (0.431)</td><td>−0.17 (0.15)</td><td>−0.14 (0.551)</td><td>−0.57 (0.422)</td><td>−0.15 (0.133)</td></tr><tr><td> Age at first sex</td><td>0.020</td><td>0.030</td><td>0.000</td><td>0.320</td><td>0.170</td><td>−0.530</td><td>1.200</td><td>−0.730</td><td>1.830</td><td>0.030</td><td>0.220</td><td>0.370</td><td>−0.790</td><td>−2.540</td><td>−0.060</td></tr><tr><td> Never had sex</td><td>0.09 (0.814)</td><td>−0.14 (0.412)</td><td>−0.03 (0.854)</td><td>−0.57 (0.327)</td><td>0.16 (0.307)</td><td>−0.87 (0.068)</td><td>−1.17 (0.026)</td><td>−2.91 (0.001)</td><td>−0.31 (0.371)</td><td>−0.21 (0.45)</td><td>−0.41 (0.161)</td><td>−0.58 (0.169)</td><td>−1.49 (0.203)</td><td>2.39 (0.347)</td><td>0.09 (0.398)</td></tr><tr><td> < 16 years</td><td>−0.01 (0.814)</td><td>0.07 (0.387)</td><td>0.31 (0.399)</td><td>−0.15 (0.704)</td><td>−0.02 (0.251)</td><td>0.15 (0.101)</td><td>0.76 (0.117)</td><td>0.28 (0.029)</td><td>0.89 (0.262)</td><td>0.1 (0.342)</td><td>0.1 (0.507)</td><td>0.48 (0.126)</td><td>0.27 (0.105)</td><td>−0.88 (0.347)</td><td>−0.03 (0.785)</td></tr><tr><td> 16–17</td><td>−0.01 (0.815)</td><td>0.05 (0.479)</td><td>−0.31 (0.138)</td><td>0.17 (0.592)</td><td>−0.04 (0.142)</td><td>0.07 (0.227)</td><td>0.58 (0.073)</td><td>0.35 (0.053)</td><td>0.64 (0.358)</td><td>0.19 (0.148)</td><td>0.16 (0.343)</td><td>0.14 (0.319)</td><td>−0.19 (0.324)</td><td>−1.53 (0.344)</td><td>−0.1 (0.222)</td></tr><tr><td> 18–19</td><td>−0.02 (0.814)</td><td>0.09 (0.404)</td><td>−0.14 (0.333)</td><td>0.67 (0.119)</td><td>0.03 (0.565)</td><td>0.14 (0.111)</td><td>0.35 (0.323)</td><td>0.53 (0.03)</td><td>0.34 (0.58)</td><td>−0.02 (0.89)</td><td>0.3 (0.146)</td><td>0.12 (0.464)</td><td>0.55 (0.043)</td><td>−1.87 (0.351)</td><td>0.01 (0.81)</td></tr><tr><td> 20 +</td><td>−0.03 (0.815)</td><td>−0.04 (0.586)</td><td>0.17 (0.115)</td><td>0.2 (0.512)</td><td>0.04 (0.743)</td><td>−0.02 (0.863)</td><td>0.68 (0.060)</td><td>1.02 (0.014)</td><td>0.27 (0.663)</td><td>−0.03 (0.778)</td><td>0.07 (0.807)</td><td>0.21 (0.361)</td><td>0.07 (0.814)</td><td>−0.65 (0.389)</td><td>−0.03 (0.646)</td></tr><tr><td> HIV⁄AIDS awareness</td><td>0.010</td><td>−0.030</td><td>0.070</td><td>0.570</td><td>0.010</td><td>−0.020</td><td>0.130</td><td>0.120</td><td>0.130</td><td>−0.010</td><td>0.040</td><td>0.030</td><td>−0.040</td><td>−0.030</td><td>0.090</td></tr><tr><td> Low</td><td>0.000 (0.815)</td><td>0.000 (0.961)</td><td>−0.07 (0.556)</td><td>−0.45 (0.048)</td><td>−0.05 (0.408)</td><td>−0.07 (0.551)</td><td>0.24 (0.429)</td><td>−0.19 (0.445)</td><td>0.92 (0.07)</td><td>−0.34 (0.014)</td><td>−0.15 (0.346)</td><td>0.01 (0.94)</td><td>0.01 (0.966)</td><td>0.26 (0.477)</td><td>0.96 (0.118)</td></tr><tr><td> Average</td><td>0 (0.819)</td><td>−0.07 (0.449)</td><td>0.02 (0.923)</td><td>1.34 (0.009)</td><td>0.09 (0.229)</td><td>−0.01 (0.893)</td><td>0.06 (0.816)</td><td>0 (0.997)</td><td>−0.76 (0.064)</td><td>−0.11 (0.347)</td><td>0.43 (0.085)</td><td>0.15 (0.375)</td><td>−0.1 (0.732)</td><td>−0.52 (0.373)</td><td>0.67 (0.049)</td></tr><tr><td> High</td><td>0.01 (0.814)</td><td>0.04 (0.466)</td><td>0.12 (0.58)</td><td>−0.32 (0.388)</td><td>−0.03 (0.716)</td><td>0.06 (0.437)</td><td>−0.18 (0.314)</td><td>0.31 (0.329)</td><td>−0.03 (0.931)</td><td>0.44 (0.004)</td><td>−0.24 (0.242)</td><td>−0.13 (0.351)</td><td>0.05 (0.794)</td><td>0.23 (0.509)</td><td>−1.54 (0.061)</td></tr><tr><td> Constant</td><td>0.04 (0.812)</td><td>3.68 (0.357)</td><td>2.48 (0.018)</td><td>−2.78 (0.309)</td><td>0.21 (0.541)</td><td>1.19 (0.183)</td><td>1.77 (0.242)</td><td>−0.3 (0.885)</td><td>1.52 (0.585)</td><td>3.09 (0.000)</td><td>9.61 (0.001)</td><td>2.4 (0.034)</td><td>5.22 (0.000)</td><td>−2.19 (0.477)</td><td>0.92 (0.126)</td></tr></tbody></table><table-wrap-foot><p><italic>P</italic>-values are reported in parenthesis; They are testing variables’ contribution to gender inequality in HIV/AIDS in each country</p><p><sup>a</sup>Domestic category not collected</p><p><sup>b</sup>Occupation type variable not collected</p><p><sup>c</sup>Unemployed category not collected</p><p><sup>d</sup>Trade and domestic category not collected</p><p><sup>e</sup>The overall absolute contribution of a given variable is equal to the sum of absolute contribution of its categories; the absolute contribution of socio-demographic characteristics, sexual behaviours, and awareness of HIV/AIDS is determined by summing the absolute contributions of all variables included in each category. The absolute contribution of a given variable to a given component was calculated as follow: the absolute difference of HIV/AIDS prevalence between women and men explained by this component multiplied by the relative contribution (in percentage) of this variable to this absolute difference in HIV/AIDS prevalence</p><p><sup>f</sup>Sexual behavioural factors are not highly correlated</p><p><sup>g</sup>Several values of dichotomous variables for the “difference due to distribution” component became identical after rounding the estimated values</p><p><sup>h</sup>Represent the contribution to gender inequalities in HIV/AIDS prevalence due to gender differences in the distributions of observable HIV/AIDS risk factors between women and men</p><p><sup>i</sup>Reflect the contribution to gender inequalities in HIV/AIDS due to gender differences in the effects of measured HIV/AIDS risk factors, as well as unmeasured factors not included in the model</p></table-wrap-foot></table-wrap><fig id="Fig3"><label>Fig. 3</label><caption><p>Contribution of factors to gender inequalities in HIV/AIDS prevalence by country</p></caption><graphic xlink:href="12889_2016_3783_Fig3_HTML" id="MO3"></graphic></fig></p><p>In Ghana (2003) and Uganda (2011), it was the composition effect that explained gender inequalities in HIV/AIDS prevalence. Differences in the distribution of sexual behaviors explained 74.1 % of the excess in HIV seropositivity among women in Ghana. For example, in Ghana 24 % of men reported that they had never had sex compared to 15.5 % of women; results from the BO decomposition imply a 57.4 % decrease in the gender inequality in HIV/AIDS if Ghanaian women and men were equally likely to report not having sex. In Uganda, the differential distribution of socio-demographic characteristics between women and men was responsible for 89 % of the gender inequality in HIV/AIDS. The differential distributions of marital status, particularly being separated, divorced, or widowed, explained 38.6 % and 21.9 % of excess HIV/AIDS seropositivity among women in Ghana and Uganda, respectively. In both countries, the differential distributions of premarital sex between men (54.3 % in Ghana, 66 % in Uganda) and women (43.1 % in Ghana, 45.5 % in Uganda) reduced gender gaps in HIV/AIDS prevalence.</p><p>In countries where both response and composition effects explained gender inequalities in HIV/AIDS prevalence (Cameroon, Guinea, Malawi, and Swaziland), age contributed to gender inequalities in HIV/AIDS prevalence. Results from the BO decomposition imply that setting the distributions of age to be the same for women and men and equalizing the effect of age on HIV/AIDS prevalence would lead to a 28.8 % decrease in the excess prevalence of HIV/AIDS among women in Swaziland. However, doing so in Guinea and Cameroon would increase these inequalities by 15.2 %. The differential effect of age did not contribute to gender inequality in HIV/AIDS in Malawi. In all four of these countries, the constant term, representing the effects of unmeasured factors, made the largest contribution to gender inequalities.</p><p>Seven countries were surveyed twice between 2003 and 2012. In six of the seven earlier surveys there was a significant difference in the prevalence of HIV/AIDS between women and men. We examined the sources of gender inequality in HIV/AIDS in these six surveys, fielded between 2004 and 2006 (Additional file <xref rid="MOESM1" ref-type="media">1</xref>: Table S2). Similar to our main findings, analyses of these six additional surveys showed that, in most countries, inequalities in HIV/AIDS prevalence between men and women were attributable to the differences in the responses to HIV/AIDS risk factors (Additional file <xref rid="MOESM1" ref-type="media">1</xref>: Table S3). The response effect of unmeasured characteristics made the largest contribution to gender inequalities in HIV/AIDS prevalence in most of these six countries. Additionally, the main sources of gender inequalities in HIV/AIDS within countries changed over time in Cameroon, Ethiopia, Malawi and Zimbabwe.</p></sec></sec><sec id="Sec10"><title>Discussion</title><p>The global burden of HIV/AIDS varies considerably between countries, with those in southern Africa being most affected by the pandemic [<xref ref-type="bibr" rid="CR60">60</xref>]. We estimated the absolute difference in HIV/AIDS prevalence comparing women to men in 21 SSA countries and identified sources of gender inequalities. Descriptive analyses showed that gender inequalities in HIV/AIDS prevalence were most pronounced in the south-east region of SSA, where socioeconomic inequalities in HIV/AIDS are also greater relative to other SSA countries [<xref ref-type="bibr" rid="CR61">61</xref>]. In these countries in particular, gender inequalities in HIV/AIDS prevalence were primarily explained by the differential effects of HIV/AIDS risk factors for men and women rather than by the differential distributions of these characteristics. Reducing gender inequalities might be essential to efforts to eliminate HIV/AIDS [<xref ref-type="bibr" rid="CR62">62</xref>].</p><p>There are gender inequalities in the prevalence of HIV/AIDS in SSA across countries. Our analyses showed that women had a higher prevalence of HIV/AIDS than men in at least three-quarters of the countries surveyed. Furthermore, a comparison of gender inequalities within countries surveyed on two occasions since 2003 suggests that these inequalities are persistent over time. Consistent with earlier work [<xref ref-type="bibr" rid="CR63">63</xref>], our results showed that gender inequalities in HIV/AIDS prevalence were larger in magnitude in countries with a greater burden of HIV/AIDS, particularly countries situated in south-east SSA, including Malawi, Mozambique, Swaziland, Zambia, and Zimbabwe. A higher probability of HIV transmission [<xref ref-type="bibr" rid="CR64">64</xref>], as well as greater community viral load (CVL) [<xref ref-type="bibr" rid="CR65">65</xref>], may contribute to greater prevalence of HIV/AIDS in this region. A systematic review of observational studies by Boily and colleagues [<xref ref-type="bibr" rid="CR64">64</xref>] suggested that regional differences might be explained by variations in contraceptive practices, differential burden of viral subtypes, and interaction with other infectious diseases, among other factors. Additionally, a recent study by Abu-Raddad and colleagues [<xref ref-type="bibr" rid="CR65">65</xref>] indicated that viral load is higher in SSA than other regions, and it is highest in southern and east Africa. Community viral load may be a central driver of the HIV epidemic in SSA, where it may reflect, among other factors, the high burden of co-infections such as malaria, tuberculosis and other tropical diseases or the preponderance of HIV-1 subtype C infection. Other work suggests that the level of wealth inequality in SSA region is associated with HIV prevalence [<xref ref-type="bibr" rid="CR65">65</xref>–<xref ref-type="bibr" rid="CR67">67</xref>].</p><p>Results from our decomposition analysis showed that the sources of gender inequality in HIV/AIDS vary across countries. In most of the countries surveyed, gender inequalities in HIV/AIDS were primarily explained by differences in the effects of risk factors—both measured (i.e. socio-demographic characteristics, sexual behaviours, and HIV⁄AIDS awareness) and unmeasured in our model—on HIV/AIDS seropositivity for women and men. Gender-related constraints, including women’s limited control of resources, may decrease women’s ability to protect themselves against diseases [<xref ref-type="bibr" rid="CR68">68</xref>] and explain our observations. For example, with respect to measured socio-demographic characteristics, the differential effects of occupation contributed to the disproportionate burden of HIV/AIDS among women in SSA. The same occupational classes may be associated with different risks for HIV/AIDS for women compared to men. For example, research indicates that unemployed women generally face poorer job prospects than unemployed men [<xref ref-type="bibr" rid="CR69">69</xref>]. Further, unemployed women are more economically dependent on their male partners and have fewer alternatives to protect themselves against disease transmission [<xref ref-type="bibr" rid="CR68">68</xref>]. Similarly, marital status has different implications for women and men in many contexts because of cultural restrictions on women’s autonomy in the public sphere. These constraints may contribute to gender inequalities in HIV/AIDS by reducing the capacity of unmarried women to engage in equitable relationships and negotiate safe sexual practices (e.g. condom use) with their partners [<xref ref-type="bibr" rid="CR70">70</xref>, <xref ref-type="bibr" rid="CR71">71</xref>], which increases the probability of HIV infection. Other research showed that women who exited an abusive marriage were likely to enter another one with new risks [<xref ref-type="bibr" rid="CR72">72</xref>], or enter domestic service, which is associated with workplace violence [<xref ref-type="bibr" rid="CR73">73</xref>].</p><p>In a subset of countries, differences in the distributions of sexual behaviors, including age at first sex and premarital sex, between women and men were the main factors contributing to gender inequalities in HIV/AIDS. The age of first sex was lower, on average, for women compared to men, suggesting they were at higher risk of HIV infection due to a longer risk period [<xref ref-type="bibr" rid="CR74">74</xref>]. Consistent with earlier work [<xref ref-type="bibr" rid="CR75">75</xref>–<xref ref-type="bibr" rid="CR78">78</xref>], interventions that delay the age at which women experience intercourse might reduce gender inequalities in HIV/AIDS. Indeed, it has been shown that a longer duration of premarital sex relative to the duration of marriage was associated with an increased odds of HIV infection and other sexually transmitted diseases [<xref ref-type="bibr" rid="CR79">79</xref>]. In our sample, women were less likely to have premarital sex compared to men (see descriptive analysis in Additional file <xref rid="MOESM1" ref-type="media">1</xref>: Table S1). This likely protected women against HIV/AIDS. Moreover, our analysis showed that in countries where composition and response sources of gender inequalities in HIV/AIDS played a significant role (e.g. Cameroon, Guinea, Malawi and Swaziland), the differential effects of unmeasured factors made a large and significant contribution. Unmeasured factors that might contribute to gender inequalities in HIV/AIDS include power processes through couple communication and collaboration [<xref ref-type="bibr" rid="CR80">80</xref>], lack of female empowerment and limited access to health resources [<xref ref-type="bibr" rid="CR40">40</xref>], social support [<xref ref-type="bibr" rid="CR81">81</xref>], migration [<xref ref-type="bibr" rid="CR82">82</xref>], and lack of an enabling environment for women [<xref ref-type="bibr" rid="CR83">83</xref>]. Also, several unmeasured biological mechanisms might increase women’s risk of contracting HIV [<xref ref-type="bibr" rid="CR84">84</xref>]. First, research indicates that during sexual intercourse women have a greater mucosal surface area exposed to infectious fluid for longer periods and are more likely to face increased tissue injury [<xref ref-type="bibr" rid="CR85">85</xref>]. Second, sexually transmitted infectious diseases increase the risk of contracting HIV, particularly for women, because these infections are often asymptomatic and untreated [<xref ref-type="bibr" rid="CR85">85</xref>–<xref ref-type="bibr" rid="CR87">87</xref>]. Third, women have a window of vulnerability after ovulation in which the potential for viral infectivity in the female reproductive tract is increased [<xref ref-type="bibr" rid="CR88">88</xref>]. Further work is required to understand how the differential effects of risk factors contribute to gender inequalities in HIV/AIDS.</p><p>Our study is subject to some potential limitations. <italic>First</italic>, although the DHS/AIS provide nationally representative estimates of HIV prevalence, our results could be biased due to the voluntary nature of the HIV test. Nevertheless, prior studies [<xref ref-type="bibr" rid="CR24">24</xref>, <xref ref-type="bibr" rid="CR89">89</xref>] showed that non-response was unlikely to bias national estimates of prevalence from the DHS. Further, it has been shown that non-response is more likely to be random than selective in the DHSs [<xref ref-type="bibr" rid="CR3">3</xref>]. <italic>Second</italic>, the cross-sectional nature of data cannot establish temporality between risk factors and outcome status, making it impossible to rule out reverse causality—our findings should therefore be interpreted as associations rather than causal estimates of the impact of intervening on HIV/AIDS risk factors. Third, because we used individual-level data we could not quantify the contribution of structural factors (e.g., CVL, wealth inequality) to gender inequalities in HIV/AIDS. In brief, this is because structural factors operate at the aggregate-level and cannot be used to decompose individual-level gender inequalities in HIV/AIDS prevalence. We also could not incorporate biological factors in our analyses, as this information was not available in our datasets. Finally, HIV risk factors were self-reported and may be reported with error; for example, individuals might misreport sexual behaviors [<xref ref-type="bibr" rid="CR90">90</xref>].</p><p>Caveats considered, the results of this study have some useful implications for future research and for potential interventions targeting gender inequalities in HIV/AIDS in SSA. First, in the majority of countries it was the differential effects of measured and unmeasured HIV/AIDS risk factors that contributed to gender inequalities. Further research, including sub-national research and mixed methods approaches, is needed to identify these risk factors and elucidate how they interact with gender to exacerbate differences in the burden of HIV/AIDS between women and men. Second, when these processes are better understood, our findings suggest that country-specific interventions and preventive programs based on the sources of gender inequalities in each context [<xref ref-type="bibr" rid="CR37">37</xref>, <xref ref-type="bibr" rid="CR38">38</xref>] will be needed to mitigate gender inequalities in HIV/AIDS in SSA. Given the different patterns that we observed in the sources and factors contributing to gender inequalities across countries, general interventions to reduce gender inequalities in HIV/AIDS may not be effective [<xref ref-type="bibr" rid="CR37">37</xref>]. Prior work [<xref ref-type="bibr" rid="CR91">91</xref>–<xref ref-type="bibr" rid="CR97">97</xref>] has proposed a structural approach to HIV prevention which takes into account the main dimensions of women’s empowerment; examining whether interventions designed to empower women reduce inequalities in HIV/AIDS is a fruitful area for further research.</p></sec><sec id="Sec11"><title>Conclusions</title><p>Using the most recent available data we measured gender inequalities in HIV/AIDS prevalence in the SSA region and identified sources and factors contributing to these inequalities. We found three unique patterns: i) countries where gender inequality in HIV/AIDS prevalence was due to differences in the distribution of risk factors between men and women, ii) countries where gender inequalities in HIV/AIDS prevalence were due to differences in the effects of risk factors on prevalence of HIV/AIDS for women and men, and iii) countries where the combination of risk factors being distributed differently and having differential effects for men and women explained gender inequalities in HIV/AIDS prevalence. In countries (e.g. Cameroon, Guinea, Malawi, and Swaziland) where unmeasured characteristics substantially contributed to gender inequalities, future work is required to understand the factors underpinning inequalities. Moreover, by adding to extant knowledge concerning the determinants of gender inequalities in HIV/AIDS in SSA, our study can help prioritize interventions to tackle gender inequalities in HIV/AIDS prevalence.</p></sec></body><back><app-group><app id="App1"><sec id="Sec12"><title>Additional file</title><p><media position="anchor" xlink:href="12889_2016_3783_MOESM1_ESM.docx" id="MOESM1"><label>Additional file 1:</label><caption><p>This document provides three tables titled “<bold>Table S1.</bold> Sample characteristics by gender and surveys”, “<bold>Table S2.</bold> Results from Blinder-Oaxaca decomposition analysis of gender inequalities in HIV/AIDS prevalence using earlier DHSs conducted between 2004 and 2006, for countries surveyed twice between 2003 and 2012” and “<bold>Table S3.</bold> Results from Blinder-Oaxaca decomposition analysis of gender inequalities in HIV/AIDS prevalence using earlier DHSs conducted between 2004 and 2006, for countries surveyed twice between 2003 and 2012”. (DOCX 110 kb)</p></caption></media></p></sec></app></app-group><ack><p>The authors gratefully acknowledge MEASURE DHS for their permission to use the datasets.</p><sec id="FPar1"><title>Funding</title><p>DS and MH are funded by the Strategic Training Program in Global Health Research, a partnership of the Canadian Institutes of Health Research (CIHR) and the Québec Population Health Research Network (QPHRN). JH and AN acknowledge the support of the Canada Research Chairs Program. DS, MH, JH, TB and AN acknowledge the support of the CIHR Operating Grant: Examining the impact of social policies on health equity (ROH-115209).</p></sec><sec id="FPar2"><title>Availability of data and materials</title><p>We used secondary data from Demographic Health Survey (<ext-link ext-link-type="uri" xlink:href="http://www.dhsprogram.com/">http://www.dhsprogram.com/</ext-link>). We confirm that all data underlying the findings are fully available without restriction. We received permission to use this data from MEASURE DHS, which is the monitoring body of the DHS.</p></sec><sec id="FPar3"><title>Authors’ contributions</title><p>All authors contributed to the conception and design of the study, DS performed the statistical analysis, all authors interpreted results, DS drafted the manuscript, and YO, MH, JH, TB and AN helped with drafting and revisions. All authors read and approved the final version of the manuscript.</p></sec><sec id="FPar4"><title>Competing interests</title><p>The authors declare that they have no competing interests.</p></sec><sec id="FPar5"><title>Consent for publication</title><p>Not applicable.</p></sec><sec id="FPar6"><title>Ethics approval and consent to participate</title><p>We used secondary data from the international Demographic and Health Survey (DHS) program and the AIDS Indicator Survey (AIS). 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