The Importance of Male Partner Involvement for Women’s Acceptability and Adherence to Female-Initiated HIV Prevention Methods in Zimbabwe
Identifieur interne : 000536 ( Pmc/Corpus ); précédent : 000535; suivant : 000537The Importance of Male Partner Involvement for Women’s Acceptability and Adherence to Female-Initiated HIV Prevention Methods in Zimbabwe
Auteurs : Elizabeth T. Montgomery ; Ariane Van Der Straten ; Agnes Chidanyika ; Tsungai Chipato ; Shabbar Jaffar ; Nancy PadianSource :
- AIDS and Behavior [ 1090-7165 ] ; 2010.
Abstract
Enlisting male partner involvement is perceived as an important component of women’s successful uptake of female-initiated HIV prevention methods. We conducted a longitudinal study among a cohort of 955 Zimbabwean women participating in a clinical trial of the effectiveness of a female-initiated HIV prevention method (the diaphragm and lubricant gel) to: (a) describe the extent to which women involved their male partners in the decision to use the study products, and (b) measure the effect perceived male partner support had on their acceptability and consistent use of these methods. Reported levels of male partner involvement in discussions and decisions regarding: joining the study, study activities, the outcome of HIV/STI test results, and product use were very high. In multivariate analyses, regular disclosure of study product use and partner approval for the diaphragm and gel were significantly associated with women’s acceptability and consistent use of the products; an essential component for determining efficacy of investigational prevention methods. These results support the need for more sophisticated measurement of how couples interact to make decisions that impact study participation and investigational product use as well as more rigorous adaptations and evaluations of existing strategies to involve male partners in female-initiated HIV prevention trials.
Url:
DOI: 10.1007/s10461-010-9806-9
PubMed: 20844946
PubMed Central: 3111667
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PMC:3111667Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The Importance of Male Partner Involvement for Women’s Acceptability and Adherence to Female-Initiated HIV Prevention Methods in Zimbabwe</title><author><name sortKey="Montgomery, Elizabeth T" sort="Montgomery, Elizabeth T" uniqKey="Montgomery E" first="Elizabeth T." last="Montgomery">Elizabeth T. Montgomery</name><affiliation><nlm:aff id="Aff1">Women’s Global Health Imperative, RTI International, San Francisco Project Office, San Francisco, CA USA</nlm:aff></affiliation><affiliation><nlm:aff id="Aff2">Department of Epidemiology, London School of Hygiene and Tropical Medicine, Infectious Disease Epidemiology Unit, London, UK</nlm:aff></affiliation></author><author><name sortKey="Van Der Straten, Ariane" sort="Van Der Straten, Ariane" uniqKey="Van Der Straten A" first="Ariane" last="Van Der Straten">Ariane Van Der Straten</name><affiliation><nlm:aff id="Aff1">Women’s Global Health Imperative, RTI International, San Francisco Project Office, San Francisco, CA USA</nlm:aff></affiliation><affiliation><nlm:aff id="Aff3">Department of Medicine, Center for AIDS Prevention Studies, University of California San Francisco, San Francisco, CA USA</nlm:aff></affiliation></author><author><name sortKey="Chidanyika, Agnes" sort="Chidanyika, Agnes" uniqKey="Chidanyika A" first="Agnes" last="Chidanyika">Agnes Chidanyika</name><affiliation><nlm:aff id="Aff4">University of Zimbabwe-University of California San Francisco Research Collaborative Programme in Women’s Health, Harare, Zimbabwe</nlm:aff></affiliation></author><author><name sortKey="Chipato, Tsungai" sort="Chipato, Tsungai" uniqKey="Chipato T" first="Tsungai" last="Chipato">Tsungai Chipato</name><affiliation><nlm:aff id="Aff4">University of Zimbabwe-University of California San Francisco Research Collaborative Programme in Women’s Health, Harare, Zimbabwe</nlm:aff></affiliation></author><author><name sortKey="Jaffar, Shabbar" sort="Jaffar, Shabbar" uniqKey="Jaffar S" first="Shabbar" last="Jaffar">Shabbar Jaffar</name><affiliation><nlm:aff id="Aff2">Department of Epidemiology, London School of Hygiene and Tropical Medicine, Infectious Disease Epidemiology Unit, London, UK</nlm:aff></affiliation></author><author><name sortKey="Padian, Nancy" sort="Padian, Nancy" uniqKey="Padian N" first="Nancy" last="Padian">Nancy Padian</name><affiliation><nlm:aff id="Aff5">University of California, Berkeley, School of Public Health, Berkeley, CA USA</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">20844946</idno><idno type="pmc">3111667</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3111667</idno><idno type="RBID">PMC:3111667</idno><idno type="doi">10.1007/s10461-010-9806-9</idno><date when="2010">2010</date><idno type="wicri:Area/Pmc/Corpus">000536</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000536</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The Importance of Male Partner Involvement for Women’s Acceptability and Adherence to Female-Initiated HIV Prevention Methods in Zimbabwe</title><author><name sortKey="Montgomery, Elizabeth T" sort="Montgomery, Elizabeth T" uniqKey="Montgomery E" first="Elizabeth T." last="Montgomery">Elizabeth T. Montgomery</name><affiliation><nlm:aff id="Aff1">Women’s Global Health Imperative, RTI International, San Francisco Project Office, San Francisco, CA USA</nlm:aff></affiliation><affiliation><nlm:aff id="Aff2">Department of Epidemiology, London School of Hygiene and Tropical Medicine, Infectious Disease Epidemiology Unit, London, UK</nlm:aff></affiliation></author><author><name sortKey="Van Der Straten, Ariane" sort="Van Der Straten, Ariane" uniqKey="Van Der Straten A" first="Ariane" last="Van Der Straten">Ariane Van Der Straten</name><affiliation><nlm:aff id="Aff1">Women’s Global Health Imperative, RTI International, San Francisco Project Office, San Francisco, CA USA</nlm:aff></affiliation><affiliation><nlm:aff id="Aff3">Department of Medicine, Center for AIDS Prevention Studies, University of California San Francisco, San Francisco, CA USA</nlm:aff></affiliation></author><author><name sortKey="Chidanyika, Agnes" sort="Chidanyika, Agnes" uniqKey="Chidanyika A" first="Agnes" last="Chidanyika">Agnes Chidanyika</name><affiliation><nlm:aff id="Aff4">University of Zimbabwe-University of California San Francisco Research Collaborative Programme in Women’s Health, Harare, Zimbabwe</nlm:aff></affiliation></author><author><name sortKey="Chipato, Tsungai" sort="Chipato, Tsungai" uniqKey="Chipato T" first="Tsungai" last="Chipato">Tsungai Chipato</name><affiliation><nlm:aff id="Aff4">University of Zimbabwe-University of California San Francisco Research Collaborative Programme in Women’s Health, Harare, Zimbabwe</nlm:aff></affiliation></author><author><name sortKey="Jaffar, Shabbar" sort="Jaffar, Shabbar" uniqKey="Jaffar S" first="Shabbar" last="Jaffar">Shabbar Jaffar</name><affiliation><nlm:aff id="Aff2">Department of Epidemiology, London School of Hygiene and Tropical Medicine, Infectious Disease Epidemiology Unit, London, UK</nlm:aff></affiliation></author><author><name sortKey="Padian, Nancy" sort="Padian, Nancy" uniqKey="Padian N" first="Nancy" last="Padian">Nancy Padian</name><affiliation><nlm:aff id="Aff5">University of California, Berkeley, School of Public Health, Berkeley, CA USA</nlm:aff></affiliation></author></analytic><series><title level="j">AIDS and Behavior</title><idno type="ISSN">1090-7165</idno><idno type="eISSN">1573-3254</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Enlisting male partner involvement is perceived as an important component of women’s successful uptake of female-initiated HIV prevention methods. We conducted a longitudinal study among a cohort of 955 Zimbabwean women participating in a clinical trial of the effectiveness of a female-initiated HIV prevention method (the diaphragm and lubricant gel) to: (a) describe the extent to which women involved their male partners in the decision to use the study products, and (b) measure the effect perceived male partner support had on their acceptability and consistent use of these methods. Reported levels of male partner involvement in discussions and decisions regarding: joining the study, study activities, the outcome of HIV/STI test results, and product use were very high. In multivariate analyses, regular disclosure of study product use and partner approval for the diaphragm and gel were significantly associated with women’s acceptability and consistent use of the products; an essential component for determining efficacy of investigational prevention methods. These results support the need for more sophisticated measurement of how couples interact to make decisions that impact study participation and investigational product use as well as more rigorous adaptations and evaluations of existing strategies to involve male partners in female-initiated HIV prevention trials.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Buck, J" uniqKey="Buck J">J Buck</name></author><author><name sortKey="Kang, Ms" uniqKey="Kang M">MS Kang</name></author><author><name sortKey="Straten, A" uniqKey="Straten A">A Straten</name></author><author><name sortKey="Khumalo Sakutukwa, G" uniqKey="Khumalo Sakutukwa G">G Khumalo-Sakutukwa</name></author><author><name sortKey="Posner, S" uniqKey="Posner S">S Posner</name></author><author><name sortKey="Padian, N" uniqKey="Padian N">N Padian</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Woodsong, C" 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<front><journal-meta><journal-id journal-id-type="nlm-ta">AIDS Behav</journal-id><journal-title-group><journal-title>AIDS and Behavior</journal-title></journal-title-group><issn pub-type="ppub">1090-7165</issn><issn pub-type="epub">1573-3254</issn><publisher><publisher-name>Springer US</publisher-name><publisher-loc>Boston</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">20844946</article-id><article-id pub-id-type="pmc">3111667</article-id><article-id pub-id-type="publisher-id">9806</article-id><article-id pub-id-type="doi">10.1007/s10461-010-9806-9</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Paper</subject></subj-group></article-categories><title-group><article-title>The Importance of Male Partner Involvement for Women’s Acceptability and Adherence to Female-Initiated HIV Prevention Methods in Zimbabwe</article-title></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name><surname>Montgomery</surname><given-names>Elizabeth T.</given-names></name><address><phone>+1-310-694-7212</phone><email>emontgomery@rti.org</email></address><xref ref-type="aff" rid="Aff1">1</xref><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>van der Straten</surname><given-names>Ariane</given-names></name><xref ref-type="aff" rid="Aff1">1</xref><xref ref-type="aff" rid="Aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Chidanyika</surname><given-names>Agnes</given-names></name><xref ref-type="aff" rid="Aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Chipato</surname><given-names>Tsungai</given-names></name><xref ref-type="aff" rid="Aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Jaffar</surname><given-names>Shabbar</given-names></name><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Padian</surname><given-names>Nancy</given-names></name><xref ref-type="aff" rid="Aff5">5</xref></contrib><aff id="Aff1"><label>1</label>Women’s Global Health Imperative, RTI International, San Francisco Project Office, San Francisco, CA USA</aff><aff id="Aff2"><label>2</label>Department of Epidemiology, London School of Hygiene and Tropical Medicine, Infectious Disease Epidemiology Unit, London, UK</aff><aff id="Aff3"><label>3</label>Department of Medicine, Center for AIDS Prevention Studies, University of California San Francisco, San Francisco, CA USA</aff><aff id="Aff4"><label>4</label>University of Zimbabwe-University of California San Francisco Research Collaborative Programme in Women’s Health, Harare, Zimbabwe</aff><aff id="Aff5"><label>5</label>University of California, Berkeley, School of Public Health, Berkeley, CA USA</aff></contrib-group><pub-date pub-type="epub"><day>16</day><month>9</month><year>2010</year></pub-date><pub-date pub-type="pmc-release"><day>16</day><month>9</month><year>2010</year></pub-date><pub-date pub-type="ppub"><month>7</month><year>2011</year></pub-date><volume>15</volume><issue>5</issue><fpage>959</fpage><lpage>969</lpage><permissions><copyright-statement>© The Author(s) 2010</copyright-statement></permissions><abstract id="Abs1"><p>Enlisting male partner involvement is perceived as an important component of women’s successful uptake of female-initiated HIV prevention methods. We conducted a longitudinal study among a cohort of 955 Zimbabwean women participating in a clinical trial of the effectiveness of a female-initiated HIV prevention method (the diaphragm and lubricant gel) to: (a) describe the extent to which women involved their male partners in the decision to use the study products, and (b) measure the effect perceived male partner support had on their acceptability and consistent use of these methods. Reported levels of male partner involvement in discussions and decisions regarding: joining the study, study activities, the outcome of HIV/STI test results, and product use were very high. In multivariate analyses, regular disclosure of study product use and partner approval for the diaphragm and gel were significantly associated with women’s acceptability and consistent use of the products; an essential component for determining efficacy of investigational prevention methods. These results support the need for more sophisticated measurement of how couples interact to make decisions that impact study participation and investigational product use as well as more rigorous adaptations and evaluations of existing strategies to involve male partners in female-initiated HIV prevention trials.</p></abstract><kwd-group><title>Keywords</title><kwd>HIV prevention</kwd><kwd>Female-initiated methods</kwd><kwd>Zimbabwe</kwd><kwd>Male involvement</kwd><kwd>Adherence</kwd><kwd>Acceptability</kwd><kwd>Couples</kwd></kwd-group><custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name><meta-value>© Springer Science+Business Media, LLC 2011</meta-value></custom-meta></custom-meta-group></article-meta></front><body><sec id="Sec1"><title>Introduction</title><p>The majority of HIV infected persons live in sub-Saharan Africa: approximately 23 million out of a worldwide 33 million at the end of 2007 [<xref ref-type="bibr" rid="CR1">1</xref>]. Within sub-Saharan Africa, women, especially young women, are disproportionately affected due to their biological and socio-cultural vulnerability [<xref ref-type="bibr" rid="CR1">1</xref>]. To address this imbalance, extensive research has been directed towards the urgent need to identify female-initiated HIV prevention methods, such as vaginal microbicides and/or barrier methods that would enable women to protect themselves from disease acquisition while potentially overcoming the obstacles that they may face when negotiating use of male condoms.</p><p>Male partner support is perceived as an essential component of women’s successful use of female-initiated methods in a research study context, and more generally, the involvement of men in women’s reproductive health has been endorsed by multinational agencies [<xref ref-type="bibr" rid="CR2">2</xref>–<xref ref-type="bibr" rid="CR17">17</xref>]. However, the risks and benefits of partner involvement are not well understood, nor are effective strategies for engaging male partners in women’s health well established. Studies that have taken the approach of enrolling couples to garner partner support have reported improvement in women’s reproductive health outcomes as measured by decreased abortions and unplanned pregnancies in China [<xref ref-type="bibr" rid="CR18">18</xref>]; modern contraceptive uptake in Ethiopia [<xref ref-type="bibr" rid="CR19">19</xref>]; uptake of nevirapine to prevent mother-to-child transmission of HIV in Kenya [<xref ref-type="bibr" rid="CR20">20</xref>]; increased safe sex behaviour and decreased HIV incidence following voluntary counselling and testing (VCT) for HIV in Africa and the US [<xref ref-type="bibr" rid="CR21">21</xref>–<xref ref-type="bibr" rid="CR26">26</xref>].</p><p>However, other observational studies have demonstrated the inverse: negative male involvement, as measured by relationship-level factors such as intimate partner violence, relationship power and decision-making, is associated with HIV risk among women [<xref ref-type="bibr" rid="CR27">27</xref>–<xref ref-type="bibr" rid="CR29">29</xref>]. Indeed, only a handful of studies have considered the potential adverse effects of involving men on women’s health and empowerment, on relationships and family dynamics, or discussed its cost, difficulty, and possible lack of effect [<xref ref-type="bibr" rid="CR30">30</xref>, <xref ref-type="bibr" rid="CR31">31</xref>]. For example, in Zimbabwe following a nationwide social marketing campaign to involve men and promote joint decision-making among couples in family planning, men were more likely to consider themselves the primary decision-makers regarding family planning and parity [<xref ref-type="bibr" rid="CR16">16</xref>]. Involving male partners in female-initiated HIV/STI prevention could similarly have the unintended effect of further disempowering women or putting them at risk for HIV: women’s use of female-initiated products could “excuse” their male partners from condom use and reduce their responsibility for safe-sex, as has been anecdotally reported in Zimbabwe and Turkey [<xref ref-type="bibr" rid="CR2">2</xref>, <xref ref-type="bibr" rid="CR9">9</xref>].</p><p>We conducted an ancillary study among Zimbabwean women participating in a multi-site clinical trial of the effectiveness of a female-initiated HIV prevention method (the diaphragm and lubricant gel) to describe the extent to which they involved their male partners in the decision to join the study and to use products<italic>.</italic> This is the first large study in the context of a phase III HIV prevention trial to systematically capture detailed prospective information about the role of the male partner in women’s study participation and product use. We also examined the association among different aspects of male involvement with women’s attitudes and behaviour regarding the use of female-initiated methods.</p></sec><sec id="Sec2" sec-type="methods"><title>Methods</title><sec id="Sec3"><title>Study Design</title><p>This study was an ancillary study of the Methods for Improving Reproductive Health in Africa (MIRA) Study, an open-label, multisite phase III randomized, controlled trial measuring the effectiveness of the diaphragm and lubricant gel in preventing HIV and STI acquisition in Zimbabwe and two sites in South Africa [<xref ref-type="bibr" rid="CR32">32</xref>]. This ancillary study, which began in Month 16 (of 40) of the main trial, was conducted among all the women enrolled at the Zimbabwe site, where a total of 1,916 MIRA participants (955 in the intervention arm) were included in the male involvement study for 12–24 months, depending on their enrolment date, from December 2004 through December 2006.</p></sec><sec id="Sec4"><title>Procedures</title><p>The MIRA trial procedures and eligibility criteria are described in detail elsewhere [<xref ref-type="bibr" rid="CR32">32</xref>]. Briefly, we enrolled sexually active, HIV-negative, non-pregnant women with no known allergy to latex and a healthy cervix, who were willing to follow the study protocol and give written informed consent. Women at the Zimbabwe site were recruited predominantly from well-baby clinics, community groups and through word-of-mouth, and invited to come to the study clinics for screening. Just under half (46%) of the women who presented for screening were enrolled in the study; the majority (60%) were ineligible because of HIV-positive status. All women randomized into MIRA at the Zimbabwe site were automatically enrolled in the male involvement study, and no additional consenting procedures were required as the scope of enquiry fell into that already approved for the study by the relevant Institutional Review Boards.</p><p>During the main MIRA enrolment informed consent procedures, women were told that they could invite their male partners to come to the clinic for free counselling and testing for STIs and HIV. During risk reduction and product counseling at the enrolment and follow-up visits, counsellors discussed male partner support and product use negotiation, and the invitation for male partners to come to the study clinic for information or counselling and testing was reiterated, however it was made clear that this was the woman’s choice and not a study requirement. Because this study was nested within a standardized clinical trial, and more overt engagement of male partners at a single site might have biased the main trial results, we did not include any kind of formal outreach, promotional activities or intervention to involve male partners, although clinic staff kept records of male partner clinic attendance (for any service).</p><p>As part of the main study, participants completed an Audio Computer-assisted Self-interview (ACASI) interview about sexual behaviour and product use at enrolment and all quarterly follow-up visits, and an Acceptability Questionnaire was administered at Month 3 and at the Exit visit via face-to-face interview. At Months 3 and 12, female study participants received an interviewer-administered “male partner involvement” questionnaire designed for this study.</p></sec><sec id="Sec5"><title>Measures</title><sec id="Sec6"><title>Male Involvement (MI) Factors</title><p>“Male involvement” factors were conceptualized and measured in three domains: (1) Joining study and study activities; (2) Communication about study product use, and (3) Perceived support for product use; through the clinic attendance records and items in the face-to-face male involvement questionnaire described above. Questionnaire items were informed by the parent study instruments, previous qualitative studies done in the region, and through pilot testing with Zimbabwean research staff (male and female) [<xref ref-type="bibr" rid="CR2">2</xref>, <xref ref-type="bibr" rid="CR7">7</xref>, <xref ref-type="bibr" rid="CR33">33</xref>–<xref ref-type="bibr" rid="CR36">36</xref>]. Because the majority of our sample was married with <2 lifetime sexual partners and only one current partner, women were asked to respond to the questionnaire regarding their primary male partner.</p><p>During initial exploratory analyses, several questionnaire items that measured similar concepts, or that did not show enough variation to be informative (i.e. 99% answered yes), were eliminated, or were combined with other items to create composite measures. Ultimately we derived 19 male partner involvement factors that measured the three domains of interest. Multicollinearity among these male involvement factors within and across domains was ruled out through the evaluation of Pearson’s correlation coefficients (<italic>r</italic> < 0.80). Response options were already dichotomous (yes/no), or were Likert-scaled, and then collapsed into dichotomous or trichotomous responses. The composite measure of male partners presenting at the clinic for testing, waiting or accompanying female participants in domain 1 included questionnaire data plus the male clinic attendance records. No data were collected directly from male partners, as the primary objective of this study was to understand how women’s perceptions of male partner support was associated with her own behaviour.</p></sec><sec id="Sec7"><title>Acceptability and Adherence Outcomes</title><p>The primary outcome of product acceptability was examined separately for the diaphragm and for the gel using a variable from the MIRA main study acceptability questionnaire administered at the study’s closing visit: “How would you rate the [diaphragm/gel] overall?”: “strongly like, like, dislike, strongly dislike.” The highly skewed distribution of the data suggested that the “like” response was used as the default socially desirable neutral response, and few women reported disliking or strongly disliking the products, thus responses were dichotomized as strongly like versus all other responses. The primary outcome for consistent product use was also taken from the acceptability form administered at the closing visit: those that reported using the diaphragm and gel (combined) for every sex act since the start of the study were categorized as “consistent users” and all others as “inconsistent users.” We assessed adherence to the combined use of the diaphragm and gel because this was how women were instructed to use the products in the trial. Acceptability of each product was measured separately as the physical properties, product attributes and potential effects on ease of use, sexual pleasure and discreet use were substantially different.</p></sec><sec id="Sec8"><title>Potential Confounders</title><p>Potential confounders included in bivariate and multivariate analyses were socio-demographic measures of the study participant and her partner, laboratory-confirmed STIs, sexual history and risk behavior of the participant and her partner, as well as contraceptive and disease prevention method use collected through FTF interview or ACASI. In the analysis of consistent use, we also controlled for women’s own report of “strongly liking” the diaphragm or gel, measured at the Exit visit through the measure described above.</p></sec><sec id="Sec9"><title>Analytical Sample and Statistical Considerations</title><p>Mostly because of delays with study initiation, over half of the total study sample (56.4%) had only one male involvement assessment, and the remainder (43.6%) had two. After confirming among the latter group of women that responses did not differ by more than 5% for each question, we retained only the last available record for each individual in analysis, resulting in a final analytical sample of 955 women. This study sample was limited to women who were in the intervention arm and received the diaphragm and gel when randomized into the MIRA trial. MI variables within the domains of interest were tabulated, and associations between these factors and the outcomes of product acceptability and consistent use were examined in a three-step process. First, bivariate associations were computed using Chi-square and Cochran–Mantel–Haenszel statistics. Following this, within each conceptual domain, the outcome of interest was regressed against all male involvement variables (results of this intermediate step are not presented). Finally, using those variables that remained significant at the <italic>P</italic> < 0.10 level in the “domain-level regression”, and significant potential confounders from bivariate analyses, multivariate logistic regression models were constructed, and final models retained independent predictors that were statistically significant at the <italic>P</italic> < 0.05 level. Automated backwards, forwards and stepwise selection procedures were used to confirm the stability of the final models. For 7.7% of the study sample, outcomes and exposures were measured at the same time point, rather than exposures preceding the outcomes. This was because a small proportion of women exited the trial at Month 12 (at the time of their male involvement assessment), and some missed their Month 12 visit and did not return to complete their male involvement questionnaire until Exit (and had missed the Month 3 assessment). All analyses were conducted using SAS, version 9.1 (Cary, NC, USA).</p></sec></sec></sec><sec id="Sec10"><title>Results</title><sec id="Sec11"><title>Characteristics of the Study Sample</title><p>Our sample of 955 Zimbabwean female participants who were randomized to receive the diaphragm and gel at enrollment is described in Table <xref rid="Tab1" ref-type="table">1</xref>. The majority of women (83%) were under 35, and partners were slightly older. Just under half of the female participants (48%) were high-school educated. While only 27% reported being employed, three-quarters (76%) reported earning income in the past year, and 84% reported that their partners were employed. The vast majority (97%) were married, and living with their partner (97%). Half the women (49%) were HSV-2 positive at baseline and a further 6% tested positive for chlamydia, gonorrhea, syphilis or trichomoniasis during the screening procedures and were treated prior to enrollment. The majority (79%) of the sample were using hormonal contraceptives (pill or injectables). Mean age of sexual debut was 18.6. Just over a quarter (26%) reported using a condom always in the past 3 months at baseline. We created 2 composite variables of behavioral risk, and 24% of women were classified as high risk, while 65% of women had partners with high risk (see Table <xref rid="Tab1" ref-type="table">1</xref> footnote for definitions).<table-wrap id="Tab1"><label>Table 1</label><caption><p>Baseline characteristics of study sample (<italic>n</italic> = 955)</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left"></th><th align="left"><italic>n</italic></th><th align="left">%</th></tr></thead><tbody><tr><td align="left" colspan="3">Demographic characteristics</td></tr><tr><td align="left" colspan="3"> Age</td></tr><tr><td align="left"> 24 years or younger</td><td align="left">357</td><td align="left">37.4</td></tr><tr><td align="left"> 25–34</td><td align="left">435</td><td align="left">45.6</td></tr><tr><td align="left"> 35 years or older</td><td align="left">163</td><td align="left">17.1</td></tr><tr><td align="left"> High school education or more</td><td align="left">457</td><td align="left">47.9</td></tr><tr><td align="left"> Earned Income in the past year</td><td align="left">721</td><td align="left">75.5</td></tr><tr><td align="left"> Employed</td><td align="left">256</td><td align="left">26.8</td></tr><tr><td align="left"> Married</td><td align="left">923</td><td align="left">96.7</td></tr><tr><td align="left"> Living with partner</td><td align="left">923</td><td align="left">96.7</td></tr><tr><td align="left"> Speak Shona at home</td><td align="left">902</td><td align="left">94.6</td></tr><tr><td align="left"> Christian</td><td align="left">799</td><td align="left">88.6</td></tr><tr><td align="left" colspan="3"> Current contraceptive use</td></tr><tr><td align="left"> Long term</td><td align="left">27</td><td align="left">2.8</td></tr><tr><td align="left"> Injectables</td><td align="left">138</td><td align="left">14.5</td></tr><tr><td align="left"> Pill</td><td align="left">618</td><td align="left">64.7</td></tr><tr><td align="left"> Barrier</td><td align="left">94</td><td align="left">9.8</td></tr><tr><td align="left"> Other/none<sup>a</sup></td><td align="left">78</td><td align="left">8.2</td></tr><tr><td align="left" colspan="3">Sexual behavior characteristics</td></tr><tr><td align="left"> Age at sexual debut (mean/median years)</td><td align="left" colspan="2">18.6/18 (range 10–29)</td></tr><tr><td align="left"> Lifetime sexual partners (mean/median number)</td><td align="left" colspan="2">1.3/1 (range 1–20)</td></tr><tr><td align="left"> HSV positive</td><td align="left">470</td><td align="left">49.3</td></tr><tr><td align="left"> Positive baseline STI</td><td align="left">61</td><td align="left">6.4</td></tr><tr><td align="left"> Has sex 3 times per week or more</td><td align="left">446</td><td align="left">46.7</td></tr><tr><td align="left"> History of high risk behavior<sup>b</sup></td><td align="left">224</td><td align="left">23.5</td></tr><tr><td align="left" colspan="3"> Condom use in the past 3 months</td></tr><tr><td align="left"> Never</td><td align="left">300</td><td align="left">31.4</td></tr><tr><td align="left"> Sometimes</td><td align="left">411</td><td align="left">43.0</td></tr><tr><td align="left"> Always</td><td align="left">244</td><td align="left">25.6</td></tr><tr><td align="left"> Condom use at last sex (enrolment)</td><td align="left">672</td><td align="left">70.4</td></tr><tr><td align="left" colspan="3">Partner characteristics</td></tr><tr><td align="left"> Male partner high risk behavior<sup>c</sup></td><td align="left">624</td><td align="left">65.3</td></tr><tr><td align="left" colspan="3"> Partner age</td></tr><tr><td align="left"> 18–30</td><td align="left">355</td><td align="left">37.2</td></tr><tr><td align="left"> 31–40</td><td align="left">408</td><td align="left">42.7</td></tr><tr><td align="left"> 41–50</td><td align="left">124</td><td align="left">13.0</td></tr><tr><td align="left"> 51 or older</td><td align="left">56</td><td align="left">5.9</td></tr><tr><td align="left"> Don’t know</td><td align="left">12</td><td align="left">1.3</td></tr><tr><td align="left"> Partner employed</td><td align="left">800</td><td align="left">83.8</td></tr></tbody></table><table-wrap-foot><p><sup>a</sup>This category includes 56 women who reported no contraception, 19 who reported withdrawal, and 1 individual each who reported use of: holy water, “traditional methods” or “natural methods”</p><p><sup>b</sup>At least one indicator vs. none of: any exchange of sex for money, food shelter, 2 or more sexual partners in past 3 months, ever had vaginal sex under the influence of drugs or alcohol in the past 3 months; ever used needle for injectable drug use; ever had anal sex</p><p><sup>c</sup>At least one indicator vs. none of: female participant having any sexual partners test positive for HIV; suspect or know that regular male partner has had other sex partners in past 3 months; regular male partner was away from home for 1 or more months</p></table-wrap-foot></table-wrap></p></sec><sec id="Sec12"><title>Male Involvement Factors, Product Acceptability and Use</title><p>The frequencies of male involvement factors, and bivariate associations with the outcomes of “strongly liking” and consistent use of the diaphragm and gel are presented by conceptual domain in Table <xref rid="Tab2" ref-type="table">2</xref>. At exit, the majority (89.4%) of women reported strongly liking the diaphragm, as well as the gel (81.0%), however only 58.2% of the sample reported using the combination of diaphragm and gel for every sex act for the duration of the study (Table <xref rid="Tab2" ref-type="table">2</xref>)<italic>.</italic><table-wrap id="Tab2"><label>Table 2</label><caption><p>Frequencies and bivariate associations between male involvement factors and strongly liking and consistent use of diaphragm and gel (<italic>n</italic> = 955)</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="3"></th><th align="left" rowspan="2" colspan="2"></th><th align="left" colspan="2">Strongly like diaphragm</th><th align="left" colspan="2">Strongly like gel</th><th align="left" colspan="2">Consistent diaphragm and gel use</th></tr><tr><th align="left">806<sup>a</sup></th><th align="left">89.4%</th><th align="left">719<sup>a</sup></th><th align="left">81.0%</th><th align="left">518<sup>a</sup></th><th align="left">58.2%</th></tr><tr><th align="left"><italic>n</italic></th><th align="left">%</th><th align="left">OR</th><th align="left">95% CI</th><th align="left">OR</th><th align="left">95% CI</th><th align="left">OR</th><th align="left">95% CI</th></tr></thead><tbody><tr><td align="left" colspan="9">Domain 1: joining study and study activities</td></tr><tr><td align="left" colspan="8"> She asked permission to join MIRA study</td><td align="left"></td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">919</td><td char="." align="char">96.3</td><td char="." align="char">1.71</td><td char="–" align="char">0.69–4.23</td><td char="." align="char">1.26</td><td char="–" align="char">0.56–2.82</td><td char="." align="char">1.15</td><td char="–" align="char">0.59–2.27</td></tr><tr><td align="left" colspan="9"> She would face problems at home if she did not ask permission first</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">667</td><td char="." align="char">70.0</td><td char="." align="char">1.65*</td><td char="–" align="char">1.09–2.51</td><td char="." align="char">1.41*</td><td char="–" align="char">1.00–1.98</td><td char="." align="char">0.90</td><td char="–" align="char">0.68–1.20</td></tr><tr><td align="left" colspan="8"> Support for her being in the study</td><td align="left"></td></tr><tr><td align="left"> Supportive/very supportive vs. not supportive</td><td char="." align="char">901</td><td char="." align="char">97.1</td><td char="." align="char">1.41</td><td char="–" align="char">0.48–4.16</td><td char="." align="char">1.19</td><td char="–" align="char">0.47–2.98</td><td char="." align="char">1.51</td><td char="–" align="char">0.70–3.25</td></tr><tr><td align="left" colspan="8"> Interest in her study participation</td><td align="left"></td></tr><tr><td align="left"> Very interested vs. somewhat or not very interested</td><td char="." align="char">514</td><td char="." align="char">54.7</td><td char="." align="char">1.35</td><td char="–" align="char">0.90–2.03</td><td char="." align="char">1.65**</td><td char="–" align="char">1.19–2.28</td><td char="." align="char">1.51**</td><td char="–" align="char">1.16–1.96</td></tr><tr><td align="left" colspan="8"> She has disclosed STI or HIV results to her partner and/or told him she will be tested for HIV/STIs at MIRA</td><td align="left"></td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">948</td><td char="." align="char">99.3</td><td char="." align="char">0.32</td><td char="–" align="char">0.20–0.51</td><td char="." align="char">0.28</td><td char="–" align="char">0.02–4.89</td><td char="." align="char">1.83</td><td char="–" align="char">0.41–8.21</td></tr><tr><td align="left" colspan="8"> She reminds him about her visits every time she goes, and he asks about her visits every time she comes home</td><td align="left"></td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">680</td><td char="." align="char">71.2</td><td char="." align="char">1.31</td><td char="–" align="char">0.86–2.02</td><td char="." align="char">1.26</td><td char="–" align="char">0.89–1.79</td><td char="." align="char">1.25</td><td char="–" align="char">0.94–1.66</td></tr><tr><td align="left" colspan="8"> Partner ever dropped off or met outside clinic</td><td align="left"></td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">163</td><td char="." align="char">17.1</td><td char="." align="char">0.94</td><td char="–" align="char">0.55–1.59</td><td char="." align="char">0.96</td><td char="–" align="char">0.63–1.48</td><td char="." align="char">0.94</td><td char="–" align="char">0.67–1.32</td></tr><tr><td align="left" colspan="9"> Partner ever came to clinic to test, accompany, or to wait inside</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">130</td><td char="." align="char">13.6</td><td char="." align="char">1.04</td><td char="–" align="char">0.57–1.89</td><td char="." align="char">1.27</td><td char="–" align="char">0.77–2.09</td><td char="." align="char">0.86</td><td char="–" align="char">0.60–1.25</td></tr><tr><td align="left" colspan="9">Domain 2: communication about product use</td></tr><tr><td align="left" colspan="9"> Ever used diaphragm or gel secretly</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">93</td><td char="." align="char">10.6</td><td char="." align="char">0.32**</td><td char="–" align="char">0.20–0.51</td><td char="." align="char">0.34**</td><td char="–" align="char">0.23–0.51</td><td char="." align="char">0.47**</td><td char="–" align="char">0.32–0.68</td></tr><tr><td align="left" colspan="9"> Told him or he implicitly knew she was using the diaphragm and gel every time she used it</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">779</td><td char="." align="char">81.6</td><td char="." align="char">2.23**</td><td char="–" align="char">1.43–3.50</td><td char="." align="char">2.40**</td><td char="–" align="char">1.66–3.47</td><td char="." align="char">2.59**</td><td char="–" align="char">1.85–3.63</td></tr><tr><td align="left" colspan="9"> He asked about proper care and storage of diaphragms or condoms, or asked if diaphragm is comfortable/fitting correctly</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">843</td><td char="." align="char">88.3</td><td char="." align="char">0.86</td><td char="–" align="char">0.47–1.56</td><td char="." align="char">0.91</td><td char="–" align="char">0.56–1.48</td><td char="." align="char">0.83</td><td char="–" align="char">0.56–1.23</td></tr><tr><td align="left" colspan="9">Domain 3: support/perception of support for product use</td></tr><tr><td align="left" colspan="9"> He helped to insert diaphragm or gel applicator</td></tr><tr><td align="left"> Yes vs. no</td><td char="." align="char">149</td><td char="." align="char">16.0</td><td char="." align="char">0.77</td><td char="–" align="char">0.46–1.29</td><td char="." align="char">1.02</td><td char="–" align="char">0.65–1.60</td><td char="." align="char">0.73*</td><td char="–" align="char">0.52–1.04</td></tr><tr><td align="left" colspan="9"> His support for the idea of using diaphragm and gel</td></tr><tr><td align="left"> Strongly supports vs. somewhat or does not support</td><td char="." align="char">422</td><td char="." align="char">44.9</td><td char="." align="char">1.52*</td><td char="–" align="char">0.99–2.32</td><td char="." align="char">1.80**</td><td char="–" align="char">1.28–2.53</td><td char="." align="char">1.54**</td><td char="–" align="char">1.18–2.00</td></tr><tr><td align="left" colspan="9"> Difficulty in convincing partner to use diaphragm</td></tr><tr><td align="left"> Somewhat difficult or difficult vs. not at all difficult</td><td char="." align="char">781</td><td char="." align="char">84.0</td><td char="." align="char">0.55</td><td char="–" align="char">0.34–0.90</td><td char="." align="char">0.54</td><td char="–" align="char">0.36–0.81</td><td char="." align="char">0.53**</td><td char="–" align="char">0.38–0.76</td></tr><tr><td align="left" colspan="9"> Difficulty in convincing partner to use condoms</td></tr><tr><td align="left"> Somewhat difficult or difficult vs. not at all difficult</td><td char="." align="char">709</td><td char="." align="char">74.8</td><td char="." align="char">0.63</td><td char="–" align="char">0.41–0.97</td><td char="." align="char">0.74</td><td char="–" align="char">0.52–1.05</td><td char="." align="char">0.58**</td><td char="–" align="char">0.43–0.78</td></tr><tr><td align="left" colspan="9"> Partner’s attitude towards diaphragm</td></tr><tr><td align="left"> Strongly likes vs. like, dislike, strongly dislike</td><td char="." align="char">292</td><td char="." align="char">31.4</td><td char="." align="char">4.19**</td><td char="–" align="char">2.20–7.96</td><td char="." align="char">2.30**</td><td char="–" align="char">1.53–3.46</td><td char="." align="char">2.63**</td><td char="–" align="char">1.95–3.56</td></tr><tr><td align="left" colspan="9"> Partner’s attitude towards gel</td></tr><tr><td align="left"> Strongly likes vs. like, dislike, strongly dislike</td><td char="." align="char">243</td><td char="." align="char">26.1</td><td char="." align="char">3.17**</td><td char="–" align="char">1.67–6.04</td><td char="." align="char">2.02**</td><td char="–" align="char">1.32–3.10</td><td char="." align="char">2.50**</td><td char="–" align="char">1.81–3.44</td></tr><tr><td align="left" colspan="9"> Partner’s attitude towards condoms</td></tr><tr><td align="left"> Strongly likes vs. like, dislike, strongly dislike</td><td char="." align="char">229</td><td char="." align="char">24.1</td><td char="." align="char">2.65**</td><td char="–" align="char">1.42–4.93</td><td char="." align="char">1.70**</td><td char="–" align="char">1.11–2.58</td><td char="." align="char">2.34**</td><td char="–" align="char">1.69–3.29</td></tr></tbody></table><table-wrap-foot><p><sup>a</sup>Denominator does not equal 955 because of missing data for exposure variables in some observations</p><p><italic>*</italic> Variable significant at <italic>P</italic> = 0.01–0.10 level</p><p><italic>**</italic> Variable significant at <italic>P</italic> < 0.01 level</p></table-wrap-foot></table-wrap></p></sec><sec id="Sec13"><title>MI in Joining Study and Study Activities</title><p>The vast majority of female participants (96.3%) reported asking permission from their male partner to join the MIRA study, and 70% of these women reported that they would face problems at home if they did not first ask permission. The latter factor was associated with strongly liking the diaphragm and gel at the <italic>P</italic> < 0.10 level (Table <xref rid="Tab2" ref-type="table">2</xref>). Only about half of the women (54.7%) reported that her partner was “very interested” in her study participation, and those that did were more likely to strongly like the gel and be consistent users (<italic>P</italic> < 0.01 for both). There was nearly universal disclosure of HIV/STI results to the male partner (99.3%) and discussions/reminders about MIRA study visits was also common (71.2%). Very few men came to the study clinic: 17.1% of men reportedly dropped off or met their female partners outside, while a smaller proportion (13.6%) came to the clinic to test, accompany or wait for their partners (as measured by women’s report in the questionnaire and clinic logs).</p></sec><sec id="Sec14"><title>Communication About Study Product Use</title><p>The majority (81.6%) of women reported that either she explicitly told her partner she was using the diaphragm/gel every time she did so, or she perceived that he implicitly knew (Table <xref rid="Tab2" ref-type="table">2</xref>).Thus, only, 10.6% of participants reported that they intentionally used the diaphragm and gel secretly at least some of the time (also Table <xref rid="Tab2" ref-type="table">2</xref>). Both of these disclosure variables were highly significantly associated with the acceptability and adherence outcomes in bivariate analysis. A high proportion (88.3%) reported their partner asked about proper storage and care of the study products or asked if the diaphragm was feeling comfortable.</p></sec><sec id="Sec15"><title>Perceived Support for Study Product Use</title><p>Despite high support for study <italic>participation</italic> (97.1%, domain 1), only 44.9% of female participants reported that their partner “strongly” supported the idea of using the diaphragm and gel (Table <xref rid="Tab2" ref-type="table">2</xref>). While perceptions of partners’ favorability towards the products was rather low, with only 31.4, 26.1 and 24.1% of women reporting that he “strongly likes” the diaphragm, gel, and condoms respectively, these measures were all highly significantly associated with all outcomes in bivariate analyses (Table <xref rid="Tab2" ref-type="table">2</xref>). Measures of it being “somewhat difficult” or “difficult” to convince the partner to use the diaphragm or condoms were negatively associated with consistent diaphragm and gel use. A small proportion of women (16.0%) reported that their male partners helped to insert the diaphragm or gel applicators at some point during use.</p></sec><sec id="Sec16"><title>Association Between MI Factors and Strongly Liking the Diaphragm and Gel</title><p>In the final multivariate models adjusting for MI factors and potential confounders, several factors were independently associated with “strongly liking” the diaphragm and gel (Table <xref rid="Tab3" ref-type="table">3</xref>). Within the domain of communication about study product use, women who reported <italic>never</italic> using the diaphragm and gel secretly were more than twice as likely to report strongly liking the diaphragm (AOR 2.69, 95% CI: 1.64–4.41) as well as strongly liking gel (AOR 2.03, 95% CI: 1.28–3.24). Women who reported that they told their male partner, or that he knew she was using the products each time were significantly more likely to strongly like the gel (AOR 1.80, 95% CI: 1.16–2.80), but not diaphragms.<table-wrap id="Tab3"><label>Table 3</label><caption><p>Multivariate associations between male involvement factors and strongly liking and consistent use of diaphragm gel</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="2">Male involvement factors</th><th align="left" colspan="2">Strongly like diaphragm<sup>a</sup> (<italic>n</italic> = 902)</th><th align="left" colspan="2">Strongly like gel<sup>b</sup> (<italic>n</italic> = 888)</th><th align="left" colspan="2">Consistent diaphragm and gel use<sup>c</sup> (<italic>n</italic> = 890)</th></tr><tr><th align="left">AOR</th><th align="left">95% CI</th><th align="left">AOR</th><th align="left">95% CI</th><th align="left">AOR</th><th align="left">95% CI</th></tr></thead><tbody><tr><td align="left" colspan="7">Joining study and study activities</td></tr><tr><td align="left"> Would face problems if she didn’t ask permission</td><td align="left">NS</td><td align="left"></td><td align="left">NS</td><td align="left"></td><td align="left">0.70</td><td char="–" align="char">0.51–0.96</td></tr><tr><td align="left" colspan="7">Communication about product use</td></tr><tr><td align="left"> Never used secretly</td><td align="left">2.69</td><td char="–" align="char">1.64–4.41</td><td align="left">2.03</td><td char="–" align="char">1.28–3.24</td><td align="left">NS</td><td align="left"></td></tr><tr><td align="left"> Told him or he knew every time</td><td align="left">NS</td><td align="left"></td><td align="left">1.80</td><td char="–" align="char">1.16–2.80</td><td align="left">2.28</td><td char="–" align="char">1.55–3.35</td></tr><tr><td align="left" colspan="7">Perceptions of support for product use</td></tr><tr><td align="left"> Partner strongly likes diaphragm</td><td align="left">3.45</td><td char="–" align="char">1.80–6.63</td><td align="left">1.79</td><td char="–" align="char">1.18–2.73</td><td align="left">2.27</td><td char="–" align="char">1.64–3.15</td></tr><tr><td align="left" colspan="7">Potential confounders</td></tr><tr><td align="left"> Age (<24 vs. 35 or older)</td><td align="left">–</td><td align="left"></td><td align="left">–</td><td align="left"></td><td align="left">0.47</td><td char="–" align="char">0.30–0.72</td></tr><tr><td align="left"> Age (25–34 vs. 35 or older)</td><td align="left">–</td><td align="left"></td><td align="left">–</td><td align="left"></td><td align="left">0.61</td><td char="–" align="char">0.40–0.94</td></tr><tr><td align="left"> Condom used at last sex (at enrolment visit)</td><td align="left">–</td><td align="left"></td><td align="left">NS</td><td align="left"></td><td align="left">1.45</td><td char="–" align="char">1.07–1.98</td></tr><tr><td align="left"> She strongly likes diaphragm</td><td align="left">–</td><td align="left"></td><td align="left">–</td><td align="left"></td><td align="left">3.51</td><td char="–" align="char">2.16–5.71</td></tr></tbody></table><table-wrap-foot><p><italic>NS</italic> variable included, but not significant, in final model; “–” variable not significant in bivariate and domain-level analysis and not included in final model</p><p><sup>a</sup>Controlling for: would face problems if permission not asked to join study, consistent disclosure of product use, perceived support for diaphragm and gel use, partner strongly liking gel, partner strongly liking condoms, education</p><p><sup>b</sup>Controlling for: would face problems if permission not asked to join study, perceived partner interest in study, perceived support for diaphragm and gel use, partner strongly liking gel, partner strongly liking condoms, education, religion, condom used at last sex (at baseline)</p><p><sup>c</sup>Controlling for: never used diaphragm and gel secretly, partner ever helped insert applicator or diaphragm, partner strongly likes condoms, education, coital frequency, baseline HSV-2 status, condom use in the last 3 months (at enrolment visit), partner’s employment status, perception of partner’s fidelity, partner’s age category</p></table-wrap-foot></table-wrap></p><p>Two other elements of women’s perceptions of partner support were also associated with women’s acceptability. Women who reported that their partners “strongly liked” the diaphragm were over three times as likely (AOR 3.45, 95% CI: 1.80–6.63) to report strongly liking the diaphragm themselves and almost twice as likely to report the same for gel (AOR 1.79, 95% CI: 1.18–2.73).</p></sec><sec id="Sec17"><title>Association Between MI Factors and Consistent Use of the Diaphragm and Gel</title><p>In the final multivariate model of male involvement factors and women’s consistent use of the products (Table <xref rid="Tab3" ref-type="table">3</xref>), communication was also important: women who reported telling their partner about diaphragm and gel use every time they had sex (or he knew implicitly) were more than twice as likely to consistently use those products (AOR 2.28, 95% CI: 1.55–3.35). Women who reported they would “face problems at home” if they did not first ask permission to join the study—a proxy measure of relationship control and harmony—were less likely to be consistent users (AOR 0.70, 95% CI: 0.51–0.96).</p><p>A woman’s own report that she “strongly liked” the diaphragm was significantly associated with consistent use (AOR 3.51, 95% CI: 2.16–5.71); furthermore, her perception of her partner’s strong liking of the diaphragm was also independently associated with consistent use (AOR 2.27, 95% CI: 1.64–3.15). Women who reported at baseline that they used a condom the last time they had sex were more likely to be consistent diaphragm and gel users (AOR 1.45, 95% CI: 1.07–1.98)<italic>.</italic> Finally, women over 35 were more likely to be consistent diaphragm and gel users, and the likelihood of using products consistently decreased with younger age group categories (Table <xref rid="Tab3" ref-type="table">3</xref>).</p></sec></sec><sec id="Sec18"><title>Discussion</title><p>This is the first study to measure how female participants in a large trial of female-initiated HIV prevention methods chose to involve their male partners, and the first to attempt to measure an association between measures of male partner involvement and product acceptability and adherence in such a study. Our hypothesis, which was confirmed, was that female study participant’s behaviors and decision-making in a patriarchal setting such as Zimbabwe, were influenced by the attitudes and actions—whether perceived or actual—of her male partner, even though the investigational products were meant to be “female-initiated”.</p><p>By better understanding the role of the male partner on women’s participation and behaviors in a HIV prevention trial, and assessing his influence, we can devise appropriate HIV prevention strategies that adapt to these socio-cultural realities. “Male involvement” is sometimes narrowly defined as the physical participation of men in study activities, or his physical presence/accompaniment to the clinic [<xref ref-type="bibr" rid="CR37">37</xref>]. Here, we also assessed several measures of partner communication and support that extended beyond attendance, to better understand those aspects of “male involvement” which are salient to women’s attitudes and behaviour. While several of the variables we examined may appear conceptually linked, i.e. if a woman reports that he was supportive of her participation in the study, one might expect he was also <italic>interested</italic> in it, we took several measures to rule out collinearity through examination of correlation matrices, and the inclusion of an intermediate step between the bivariate analyses and the final multivariate models in which the outcome was regressed against individual items within each domain<italic>,</italic> which lends insight into the complex nuances of male partner involvement.</p><p>This study identified three key findings about male partner involvement in women’s clinical trial participation and the use of female-initiated methods for disease prevention. First the majority of female study participants involved their partners largely by: (a) requesting permission of their primary male partners to join the study; (b) involving their partner in the routine aspects of the study including test results disclosure and visit reminders, and (c) notifying them regularly about use of the diaphragm and gel. Other smaller and shorter studies of female-initiated methods have also reported high levels of partner communication, where women almost universally disclose participation and use of products to their partners, despite the fact that the investigational products—whether diaphragms or gels—could be used without partner knowledge [<xref ref-type="bibr" rid="CR2">2</xref>, <xref ref-type="bibr" rid="CR10">10</xref>, <xref ref-type="bibr" rid="CR35">35</xref>]. Our findings also support previous qualitative work in the region where women and male partners have discussed the importance of involving the male partner in the research study process [<xref ref-type="bibr" rid="CR33">33</xref>, <xref ref-type="bibr" rid="CR34">34</xref>, <xref ref-type="bibr" rid="CR38">38</xref>]. Only about 10% of women reported <italic>ever</italic> using the diaphragm and gel secretly, and a smaller proportion did so consistently throughout the study [<xref ref-type="bibr" rid="CR39">39</xref>].</p><p>Here, we didn’t specifically explore the motivation for women’s decision to involve her male partner. However, our qualitative data and the finding that approximately 70% of women reported that would “face problems at home” if they did not first ask permission to join the study suggest that a major impetus is rooted in a fear of negative consequences if the male partner was <italic>not</italic> involved [<xref ref-type="bibr" rid="CR39">39</xref>]. This interpretation is corroborated by other qualitative work indicating that men in Zimbabwe want to remain the “decision-makers” in matters of reproductive health [<xref ref-type="bibr" rid="CR2">2</xref>].</p><p>Secondly, women who openly reminded their partner, or whose partners knew she was using the diaphragm and gel every time were significantly more likely to strongly like<italic>,</italic> and consistently use both products. Similarly, those who never used them secretly were more likely to report strongly liking the diaphragm and gel. These results corroborate, in part, the findings of a 6-month diaphragm acceptability study in Zimbabwe among 186 women, where women who either always or never disclosed use were significantly more likely to be consistent diaphragm users [<xref ref-type="bibr" rid="CR10">10</xref>]. As has been discussed previously, disclosure of product use and discrete use is a nuanced continuum where partners’ knowledge of product use might range from complete awareness at each episode, to implied use (i.e. male partner knows in general that his partner is using the diaphragm, but she does not tell him at every act of sex), to occasional covert use, to complete covert use [<xref ref-type="bibr" rid="CR39">39</xref>, <xref ref-type="bibr" rid="CR40">40</xref>]. Our findings suggest that open and successful dialogue about product use with partners—both in terms of disclosure and negotiation for use—enhance women’s acceptability and use of the products in a trial setting.</p><p>Our third key finding is that when women perceived that their male partners strongly liked the study products they were also more likely to strongly like and use them. This has been reported in smaller studies in the region, and a study in the United States among diaphragm-users [<xref ref-type="bibr" rid="CR41">41</xref>, <xref ref-type="bibr" rid="CR42">42</xref>]. It is perhaps intuitive that if one member of a sexual dyad felt strongly in either direction about the use of a contraceptive or disease prevention method, this would be likely to influence the other member. However, in this and other studies of female-initiated HIV prevention methods, acceptability is often assessed as the female study participant’s attitudes, and/or her perception of her partner’s attitudes, with little to no measurement of whether and how her attitudes might change or affect her partner’s, and vice versa. Although we were able to independently assess whether the women’s own strong liking of a product, and her perception of her partners liking the product were independently associated with consistent use, we could not disentangle the interdependent effect of one partner’s attitudes and behaviors on the other.</p><p>So as to better capture the effect of one partner’s attitude on the other, future research with women in stable partnerships should use study designs that incorporate the couple as well as more sophisticated measurements and analytical techniques that capture the interdependence of attitudes and behaviors between partners. Although potentially resource-intensive, enrolling discordant couples may be the most effective and efficient means of gaining male partner support for product use, measuring male partner influence, and assessing efficacy of an investigational product for the prevention of heterosexual HIV transmission in women. While the recently completed Partners in Prevention study demonstrated that enrolling large numbers of serodiscordant couples is feasible [<xref ref-type="bibr" rid="CR43">43</xref>], other less-intensive approaches to involving male partners in women’s prevention trials could also be considered, for example study teams might offer couples counseling and information sessions for men to encourage open partner-communication and approval for investigational products; and present various techniques for initiating conversations such as role-playing exercises. The effort to involve men in such interactions might empower them to be more positively involved in their female partner’s health in general and specifically, more supportive of protocol activities. Sessions could further provide venues to address concerns and highlight potentially positive aspects of product characteristics, such as enhanced lubrication and sexual pleasure.</p><p>There are a number of potential limitations in this study. The first is related to the inherent difficulty in defining and quantifying “male involvement”, as no set standard exists. We measured several different types of male involvement, but the positive or negative nature of each aspect of involvement was not quantified. Further, while we broadened our conceptual definition of male partner involvement from physical presence in the clinic to include such concepts as women’s perceptions of her partner’s support and effective couples communication, we only focused on the primary male partner, and this limits the generalizability of our findings.</p><p>The second limitation is potential selection bias—because the sample is comprised of women who have opted (or been allowed) to join a clinical trial to begin with, they may be different from women in the general community in significant ways, and particularly with regard to their partnerships. Women who enrolled in the study may be in partnerships with inherently more cooperative partners with whom more open communication can occur compared to women who do not (or cannot) participate. Of note, the majority of this population was married (97%) and had less than 2 lifetime sexual partners. In light of these first two limitations, an important consideration for future research is how “male involvement” would influence different sub-populations of women (i.e. commercial sex workers, unmarried women, widows); women in different cultural settings and in regards to different partnership types (casual partners vs. husbands vs. clients, both serially and concurrently). In addition, participants that were classified as lost-to follow-up (LTFU) were not included in this analysis, and reasons for LTFU may have been partner-related. This bias was minimized by our overall retention rate of 96%, and our inclusion of Month 3 data for those that did not have a Closing visit. A third limitation is that the exposure and outcome variables for this study are based on self-reported data collected through interviewer-administered questionnaires, and subject to both recall and social desirability biases. The latter may have been partially overcome through use of a more confidential data collection modality, such as ACASI. However, we knew from previous analyses that the adherence outcome measure used here (collected face-to-face) yielded almost identical results to our ACASI data on consistent product use throughout the trial [<xref ref-type="bibr" rid="CR32">32</xref>, <xref ref-type="bibr" rid="CR44">44</xref>]. Further, because of the way in which the data were collected, we were able to assess the effect of male involvement on women’s acceptability of the diaphragm or gel, and on use of the products in combination, but unable to measure how MI was associated with acceptability of the combination product, or use of the products individually. These measures may have yielded different results, and future studies of combination products should measure acceptability and use of all components individually and in combination.</p><p>As with all studies, there may be other confounding factors not measured, considered or controlled for in this analysis. Importantly, it should also be noted that in this study, the products evaluated were coitally-dependent which may have necessitated more dialogue and disclosure of use with the male partner. Other coitally independent approaches, such as diaphragms worn continuously, vaginal rings or daily insertion of gels, are currently under investigation; such methods will undoubtedly have an effect on the nature of male involvement and level of discussion between partners.</p><p>Potentially the most significant limitation is that we measured male involvement from the perspective of the women only. Although this may seem counterintuitive in a study about men, we were interested in women’s attitudes and behaviours as influenced by her perceptions of her partner, irrespective of the accuracy of these perceptions. Even if a male partner had told us he was very supportive of diaphragm use, his partner might not know or perceive this to be true, and would act in response to her own beliefs. Finally, because this study was nested within a clinical trial it was not possible to explore the effect of an intervention to promote male involvement on women’s behaviour. To measure such an effect, it would be ideal to offer a male partner intervention in a randomized design.</p><p>However, because there was no formalized intervention or procedure to involve male partners, not surprisingly, only a small proportion of partners came to the clinic: 13.6% came inside to wait or have services, 17.1% dropped off or met her outside. Clearly we had too little power to detect the effect of bringing men to the clinic on women’s behavioral outcomes, however, it is also possible that encouraging men to be involved by the commonly discussed strategy of inviting them to attend a clinic visit is not efficacious. Qualitative data from this study suggest that an important barrier for men coming to the study clinic was the perception that they would have to learn their HIV status, and that this information might be shared with their female partner. There is a paucity of evidence-based strategies to effectively engage male partners in women’s health research, particularly those in which HIV testing and novel female-initiated methods are introduced.</p><p>In conclusion, this study confirmed that even in the context of a clinical trial of a female-initiated HIV prevention method in Zimbabwe, male partners play a critical role in women’s discussions and decisions regarding joining the study, study activities, test results and investigational product use. Women’s report of full disclosure of study product use and partner approval for products were significantly associated with their acceptability and consistent use; an essential component of determining the efficacy of an investigational prevention method. Our results also support the need for more sophisticated measurement of how couples interact to make decisions that affect study-related behaviors as well as more concerted efforts to encourage male partner involvement in female-related HIV prevention trials. Mandatory counseling or education sessions with male partners and/or couples, or even couples-based enrollment should be important considerations for future studies.</p></sec></body><back><ack><p>We would first and foremost like to acknowledge the women who participated in this study. In addition, we are indebted to the efforts of the administrative and data coordination staff at the University of California, San Francisco; and staff at Ibis Reproductive Health; The University of Zimbabwe—University of California, San Francisco Collaborative Research Programme; the Medical Research Council, HIV Prevention Research Unit (Durban); and Perinatal HIV Research Unit of the University of the Witwatersrand. ET Montgomery was the Principal Investigator for the Male Involvement study and the Protocol Director for the MIRA Study, wrote the majority of the paper, and conducted the analysis for this manuscript. A. van der Straten was the co-principal investigator of MIRA and provided scientific guidance and interpretation on this study and the analysis. A. Chidanyika was the Project Director at the research sites and reviewed and edited each draft of the manuscript. T. Chipato was the Site Investigator for MIRA at the University of Zimbabwe and provided overall guidance to the study, and reviewed each draft of this manuscript. S. Jaffar was the PhD Supervisor to ET Montgomery, and provided scientific guidance on the development of the project, analysis and interpretation of findings. He reviewed each version of the manuscript. N. 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