Methodology and Early Findings of the Fifth Survey of Childhood and Adolescence Surveillance and Prevention of Adult Noncommunicable Disease: The CASPIAN-V Study
Identifieur interne : 002576 ( Pmc/Corpus ); précédent : 002575; suivant : 002577Methodology and Early Findings of the Fifth Survey of Childhood and Adolescence Surveillance and Prevention of Adult Noncommunicable Disease: The CASPIAN-V Study
Auteurs : Mohammad Esmaeil Motlagh ; Hasan Ziaodini ; Mostafa Qorbani ; Majzoubeh Taheri ; Tahereh Aminaei ; Azam Goodarzi ; Asal Ataie-Jafari ; Fatemeh Rezaei ; Zeinab Ahadi ; Gita Shafiee ; Ali Shahsavari ; Ramin Heshmat ; Roya KelishadiSource :
- International Journal of Preventive Medicine [ 2008-7802 ] ; 2017.
Abstract
This paper presents the methodology and early findings of the fifth survey of a school-based surveillance program in Iran.
This nationwide study was conducted in 2015 as the fifth survey of a surveillance program entitled “Childhood and Adolescence Surveillance and PreventIon of Adult Non- communicable disease” (CASPIAN-V) study. The protocol was mainly based on the World Health Organization-Global School student Health Survey. We studied 14400 students, aged 7-18 years, and their parents living in 30 provinces in Iran. Fasting blood was obtained from a sub-sample of 4200 randomly selected students.
The participation rate for the whole study and for blood sampling were 99% and 91.5%, respectively. The mean (SD) age of participants was 12.3 (3.2) years, consisting of 49.4% girls and 71.4% urban residents. Overall, 16.1% were underweight (17.4% of boys and 14.8% of girls), and 20.8% had excess weight consisting of 9.4% (8.7% of boys and 10.2% of girls) of overweight and 11.4% (12.5% of boys and 10.3% of girls) of obesity. Abdominal obesity was documented in 21.1% of students (21.6% of boys and 20.5% of girls). Low HDL-C was the most prevalent abnormality of the lipid profile (29.5%) followed by high serum triglycerides (27.7%). Of students, 59.9% consumed whole wheat bread; and 57% reported that they never or rarely added salt to table. The reported daily consumption of fresh fruits, vegetables, and milk was about 60%, 32% and 40%, respectively. 13.7% of participants had at least 30-min daily leisure-time physical activity.
The current findings provide an overview of the current health status and lifestyle habits of children and adolescents. This surveillance program would help planning preventive programs at individual and community levels.
Url:
DOI: 10.4103/2008-7802.198915
PubMed: 28217266
PubMed Central: 5288959
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Methodology and Early Findings of the Fifth Survey of Childhood and Adolescence Surveillance and Prevention of Adult Noncommunicable Disease: The CASPIAN-V Study</title><author><name sortKey="Motlagh, Mohammad Esmaeil" sort="Motlagh, Mohammad Esmaeil" uniqKey="Motlagh M" first="Mohammad Esmaeil" last="Motlagh">Mohammad Esmaeil Motlagh</name><affiliation><nlm:aff id="aff1">Bureau of Family, Population, Youth and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation><affiliation><nlm:aff id="aff2">Department of Pediatrics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran</nlm:aff></affiliation></author><author><name sortKey="Ziaodini, Hasan" sort="Ziaodini, Hasan" uniqKey="Ziaodini H" first="Hasan" last="Ziaodini">Hasan Ziaodini</name><affiliation><nlm:aff id="aff3">Health Psychology Department, Research Center of Education Ministry Studies, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Qorbani, Mostafa" sort="Qorbani, Mostafa" uniqKey="Qorbani M" first="Mostafa" last="Qorbani">Mostafa Qorbani</name><affiliation><nlm:aff id="aff4">Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran</nlm:aff></affiliation><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Taheri, Majzoubeh" sort="Taheri, Majzoubeh" uniqKey="Taheri M" first="Majzoubeh" last="Taheri">Majzoubeh Taheri</name><affiliation><nlm:aff id="aff6">Office of Adolescents and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Aminaei, Tahereh" sort="Aminaei, Tahereh" uniqKey="Aminaei T" first="Tahereh" last="Aminaei">Tahereh Aminaei</name><affiliation><nlm:aff id="aff6">Office of Adolescents and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Goodarzi, Azam" sort="Goodarzi, Azam" uniqKey="Goodarzi A" first="Azam" last="Goodarzi">Azam Goodarzi</name><affiliation><nlm:aff id="aff7">Department of Health Education and Promotion, Tarbiat Modarres University, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Ataie Jafari, Asal" sort="Ataie Jafari, Asal" uniqKey="Ataie Jafari A" first="Asal" last="Ataie-Jafari">Asal Ataie-Jafari</name><affiliation><nlm:aff id="aff8">Department of Nutrition, Science and Research Branch, Islamic Azad University, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Rezaei, Fatemeh" sort="Rezaei, Fatemeh" uniqKey="Rezaei F" first="Fatemeh" last="Rezaei">Fatemeh Rezaei</name><affiliation><nlm:aff id="aff9">Department of Social Medicine, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran</nlm:aff></affiliation></author><author><name sortKey="Ahadi, Zeinab" sort="Ahadi, Zeinab" uniqKey="Ahadi Z" first="Zeinab" last="Ahadi">Zeinab Ahadi</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Shafiee, Gita" sort="Shafiee, Gita" uniqKey="Shafiee G" first="Gita" last="Shafiee">Gita Shafiee</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Shahsavari, Ali" sort="Shahsavari, Ali" uniqKey="Shahsavari A" first="Ali" last="Shahsavari">Ali Shahsavari</name><affiliation><nlm:aff id="aff10">Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff></affiliation></author><author><name sortKey="Heshmat, Ramin" sort="Heshmat, Ramin" uniqKey="Heshmat R" first="Ramin" last="Heshmat">Ramin Heshmat</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Kelishadi, Roya" sort="Kelishadi, Roya" uniqKey="Kelishadi R" first="Roya" last="Kelishadi">Roya Kelishadi</name><affiliation><nlm:aff id="aff11">Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">28217266</idno><idno type="pmc">5288959</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5288959</idno><idno type="RBID">PMC:5288959</idno><idno type="doi">10.4103/2008-7802.198915</idno><date when="2017">2017</date><idno type="wicri:Area/Pmc/Corpus">002576</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002576</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Methodology and Early Findings of the Fifth Survey of Childhood and Adolescence Surveillance and Prevention of Adult Noncommunicable Disease: The CASPIAN-V Study</title><author><name sortKey="Motlagh, Mohammad Esmaeil" sort="Motlagh, Mohammad Esmaeil" uniqKey="Motlagh M" first="Mohammad Esmaeil" last="Motlagh">Mohammad Esmaeil Motlagh</name><affiliation><nlm:aff id="aff1">Bureau of Family, Population, Youth and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation><affiliation><nlm:aff id="aff2">Department of Pediatrics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran</nlm:aff></affiliation></author><author><name sortKey="Ziaodini, Hasan" sort="Ziaodini, Hasan" uniqKey="Ziaodini H" first="Hasan" last="Ziaodini">Hasan Ziaodini</name><affiliation><nlm:aff id="aff3">Health Psychology Department, Research Center of Education Ministry Studies, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Qorbani, Mostafa" sort="Qorbani, Mostafa" uniqKey="Qorbani M" first="Mostafa" last="Qorbani">Mostafa Qorbani</name><affiliation><nlm:aff id="aff4">Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran</nlm:aff></affiliation><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Taheri, Majzoubeh" sort="Taheri, Majzoubeh" uniqKey="Taheri M" first="Majzoubeh" last="Taheri">Majzoubeh Taheri</name><affiliation><nlm:aff id="aff6">Office of Adolescents and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Aminaei, Tahereh" sort="Aminaei, Tahereh" uniqKey="Aminaei T" first="Tahereh" last="Aminaei">Tahereh Aminaei</name><affiliation><nlm:aff id="aff6">Office of Adolescents and School Health, Ministry of Health and Medical Education, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Goodarzi, Azam" sort="Goodarzi, Azam" uniqKey="Goodarzi A" first="Azam" last="Goodarzi">Azam Goodarzi</name><affiliation><nlm:aff id="aff7">Department of Health Education and Promotion, Tarbiat Modarres University, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Ataie Jafari, Asal" sort="Ataie Jafari, Asal" uniqKey="Ataie Jafari A" first="Asal" last="Ataie-Jafari">Asal Ataie-Jafari</name><affiliation><nlm:aff id="aff8">Department of Nutrition, Science and Research Branch, Islamic Azad University, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Rezaei, Fatemeh" sort="Rezaei, Fatemeh" uniqKey="Rezaei F" first="Fatemeh" last="Rezaei">Fatemeh Rezaei</name><affiliation><nlm:aff id="aff9">Department of Social Medicine, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran</nlm:aff></affiliation></author><author><name sortKey="Ahadi, Zeinab" sort="Ahadi, Zeinab" uniqKey="Ahadi Z" first="Zeinab" last="Ahadi">Zeinab Ahadi</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Shafiee, Gita" sort="Shafiee, Gita" uniqKey="Shafiee G" first="Gita" last="Shafiee">Gita Shafiee</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Shahsavari, Ali" sort="Shahsavari, Ali" uniqKey="Shahsavari A" first="Ali" last="Shahsavari">Ali Shahsavari</name><affiliation><nlm:aff id="aff10">Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff></affiliation></author><author><name sortKey="Heshmat, Ramin" sort="Heshmat, Ramin" uniqKey="Heshmat R" first="Ramin" last="Heshmat">Ramin Heshmat</name><affiliation><nlm:aff id="aff5">Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff></affiliation></author><author><name sortKey="Kelishadi, Roya" sort="Kelishadi, Roya" uniqKey="Kelishadi R" first="Roya" last="Kelishadi">Roya Kelishadi</name><affiliation><nlm:aff id="aff11">Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff></affiliation></author></analytic><series><title level="j">International Journal of Preventive Medicine</title><idno type="ISSN">2008-7802</idno><idno type="eISSN">2008-8213</idno><imprint><date when="2017">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title><p>This paper presents the methodology and early findings of the fifth survey of a school-based surveillance program in Iran.</p></sec><sec id="st2"><title>Methods:</title><p>This nationwide study was conducted in 2015 as the fifth survey of a surveillance program entitled “Childhood and Adolescence Surveillance and PreventIon of Adult Non- communicable disease” (CASPIAN-V) study. The protocol was mainly based on the World Health Organization-Global School student Health Survey. We studied 14400 students, aged 7-18 years, and their parents living in 30 provinces in Iran. Fasting blood was obtained from a sub-sample of 4200 randomly selected students.</p></sec><sec id="st3"><title>Results:</title><p>The participation rate for the whole study and for blood sampling were 99% and 91.5%, respectively. The mean (SD) age of participants was 12.3 (3.2) years, consisting of 49.4% girls and 71.4% urban residents. Overall, 16.1% were underweight (17.4% of boys and 14.8% of girls), and 20.8% had excess weight consisting of 9.4% (8.7% of boys and 10.2% of girls) of overweight and 11.4% (12.5% of boys and 10.3% of girls) of obesity. Abdominal obesity was documented in 21.1% of students (21.6% of boys and 20.5% of girls). Low HDL-C was the most prevalent abnormality of the lipid profile (29.5%) followed by high serum triglycerides (27.7%). Of students, 59.9% consumed whole wheat bread; and 57% reported that they never or rarely added salt to table. The reported daily consumption of fresh fruits, vegetables, and milk was about 60%, 32% and 40%, respectively. 13.7% of participants had at least 30-min daily leisure-time physical activity.</p></sec><sec id="st4"><title>Conclusions:</title><p>The current findings provide an overview of the current health status and lifestyle habits of children and adolescents. This surveillance program would help planning preventive programs at individual and community levels.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Demaio, Ar" uniqKey="Demaio A">AR Demaio</name></author><author><name sortKey="Kragelund Nielsen, K" uniqKey="Kragelund Nielsen K">K Kragelund Nielsen</name></author><author><name sortKey="Pinkowski Tersb L, B" uniqKey="Pinkowski Tersb L B">B Pinkowski Tersbøl</name></author><author><name sortKey="Kallestrup, P" uniqKey="Kallestrup P">P Kallestrup</name></author><author><name sortKey="Meyrowitsch, Dw" uniqKey="Meyrowitsch D">DW Meyrowitsch</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lopez, Ad" uniqKey="Lopez A">AD Lopez</name></author><author><name sortKey="Mathers, Cd" uniqKey="Mathers C">CD Mathers</name></author><author><name sortKey="Ezzati, M" uniqKey="Ezzati M">M Ezzati</name></author><author><name sortKey="Jamison, Dt" 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Int J Prev Med</journal-id><journal-id journal-id-type="iso-abbrev">Int J Prev Med</journal-id><journal-id journal-id-type="publisher-id">IJPVM</journal-id><journal-title-group><journal-title>International Journal of Preventive Medicine</journal-title></journal-title-group><issn pub-type="ppub">2008-7802</issn><issn pub-type="epub">2008-8213</issn><publisher><publisher-name>Medknow Publications & Media Pvt Ltd</publisher-name><publisher-loc>India</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">28217266</article-id><article-id pub-id-type="pmc">5288959</article-id><article-id pub-id-type="publisher-id">IJPVM-8-4</article-id><article-id pub-id-type="doi">10.4103/2008-7802.198915</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Methodology and Early Findings of the Fifth Survey of Childhood and Adolescence Surveillance and Prevention of Adult Noncommunicable Disease: The CASPIAN-V Study</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Motlagh</surname><given-names>Mohammad Esmaeil</given-names></name><xref ref-type="aff" rid="aff1">1</xref><xref ref-type="aff" rid="aff2">2</xref><xref ref-type="author-notes" rid="fn1">*</xref></contrib><contrib contrib-type="author"><name><surname>Ziaodini</surname><given-names>Hasan</given-names></name><xref ref-type="aff" rid="aff3">3</xref><xref ref-type="author-notes" rid="fn1">*</xref></contrib><contrib contrib-type="author"><name><surname>Qorbani</surname><given-names>Mostafa</given-names></name><xref ref-type="aff" rid="aff4">4</xref><xref ref-type="aff" rid="aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Taheri</surname><given-names>Majzoubeh</given-names></name><xref ref-type="aff" rid="aff6">6</xref></contrib><contrib contrib-type="author"><name><surname>Aminaei</surname><given-names>Tahereh</given-names></name><xref ref-type="aff" rid="aff6">6</xref></contrib><contrib contrib-type="author"><name><surname>Goodarzi</surname><given-names>Azam</given-names></name><xref ref-type="aff" rid="aff7">7</xref></contrib><contrib contrib-type="author"><name><surname>Ataie-Jafari</surname><given-names>Asal</given-names></name><xref ref-type="aff" rid="aff8">8</xref></contrib><contrib contrib-type="author"><name><surname>Rezaei</surname><given-names>Fatemeh</given-names></name><xref ref-type="aff" rid="aff9">9</xref></contrib><contrib contrib-type="author"><name><surname>Ahadi</surname><given-names>Zeinab</given-names></name><xref ref-type="aff" rid="aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Shafiee</surname><given-names>Gita</given-names></name><xref ref-type="aff" rid="aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Shahsavari</surname><given-names>Ali</given-names></name><xref ref-type="aff" rid="aff10">10</xref></contrib><contrib contrib-type="author"><name><surname>Heshmat</surname><given-names>Ramin</given-names></name><xref ref-type="aff" rid="aff5">5</xref><xref ref-type="author-notes" rid="fn2">**</xref><xref ref-type="corresp" rid="cor1"></xref></contrib><contrib contrib-type="author"><name><surname>Kelishadi</surname><given-names>Roya</given-names></name><xref ref-type="aff" rid="aff11">11</xref><xref ref-type="author-notes" rid="fn2">**</xref><xref ref-type="corresp" rid="cor1"></xref></contrib></contrib-group><aff id="aff1"><label>1</label>Bureau of Family, Population, Youth and School Health, Ministry of Health and Medical Education, Tehran, Iran</aff><aff id="aff2"><label>2</label>Department of Pediatrics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran</aff><aff id="aff3"><label>3</label>Health Psychology Department, Research Center of Education Ministry Studies, Tehran, Iran</aff><aff id="aff4"><label>4</label>Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran</aff><aff id="aff5"><label>5</label>Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran</aff><aff id="aff6"><label>6</label>Office of Adolescents and School Health, Ministry of Health and Medical Education, Tehran, Iran</aff><aff id="aff7"><label>7</label>Department of Health Education and Promotion, Tarbiat Modarres University, Tehran, Iran</aff><aff id="aff8"><label>8</label>Department of Nutrition, Science and Research Branch, Islamic Azad University, Tehran, Iran</aff><aff id="aff9"><label>9</label>Department of Social Medicine, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran</aff><aff id="aff10"><label>10</label>Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran</aff><aff id="aff11"><label>11</label>Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran</aff><author-notes><corresp id="cor1"><bold>Correspondence to:</bold> Prof. Roya Kelishadi, Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran. E-mail: <email xlink:href="kelishadi@med.mui.ac.ir">kelishadi@med.mui.ac.ir</email>Dr.Ramin Heshmat, Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. E-mail: <email xlink:href="rheshmat@tums.ac.ir">rheshmat@tums.ac.ir</email></corresp><fn id="fn1"><label>*</label><p>Equally contributed as first authors</p></fn><fn id="fn2"><label>**</label><p>Equally contributed as corresponding author</p></fn></author-notes><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>23</day><month>1</month><year>2017</year></pub-date><volume>8</volume><elocation-id>4</elocation-id><history><date date-type="received"><day>20</day><month>9</month><year>2016</year></date><date date-type="accepted"><day>21</day><month>11</month><year>2016</year></date></history><permissions><copyright-statement>Copyright: © 2017 International Journal of Preventive Medicine</copyright-statement><copyright-year>2017</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-sa/3.0"><license-p>This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.</license-p></license></permissions><abstract><sec id="st1"><title>Background:</title><p>This paper presents the methodology and early findings of the fifth survey of a school-based surveillance program in Iran.</p></sec><sec id="st2"><title>Methods:</title><p>This nationwide study was conducted in 2015 as the fifth survey of a surveillance program entitled “Childhood and Adolescence Surveillance and PreventIon of Adult Non- communicable disease” (CASPIAN-V) study. The protocol was mainly based on the World Health Organization-Global School student Health Survey. We studied 14400 students, aged 7-18 years, and their parents living in 30 provinces in Iran. Fasting blood was obtained from a sub-sample of 4200 randomly selected students.</p></sec><sec id="st3"><title>Results:</title><p>The participation rate for the whole study and for blood sampling were 99% and 91.5%, respectively. The mean (SD) age of participants was 12.3 (3.2) years, consisting of 49.4% girls and 71.4% urban residents. Overall, 16.1% were underweight (17.4% of boys and 14.8% of girls), and 20.8% had excess weight consisting of 9.4% (8.7% of boys and 10.2% of girls) of overweight and 11.4% (12.5% of boys and 10.3% of girls) of obesity. Abdominal obesity was documented in 21.1% of students (21.6% of boys and 20.5% of girls). Low HDL-C was the most prevalent abnormality of the lipid profile (29.5%) followed by high serum triglycerides (27.7%). Of students, 59.9% consumed whole wheat bread; and 57% reported that they never or rarely added salt to table. The reported daily consumption of fresh fruits, vegetables, and milk was about 60%, 32% and 40%, respectively. 13.7% of participants had at least 30-min daily leisure-time physical activity.</p></sec><sec id="st4"><title>Conclusions:</title><p>The current findings provide an overview of the current health status and lifestyle habits of children and adolescents. This surveillance program would help planning preventive programs at individual and community levels.</p></sec></abstract><kwd-group><kwd>Children and adolescents</kwd><kwd>methodology</kwd><kwd>prevention</kwd><kwd>surveillance</kwd></kwd-group></article-meta></front><body><sec sec-type="intro" id="sec1-1"><title>INTRODUCTION</title><p>Chronic, noncommunicable diseases (NCDs) act as an undeniable threat to global health, as well as socioeconomic development.[<xref rid="ref1" ref-type="bibr">1</xref><xref rid="ref2" ref-type="bibr">2</xref>] Defined by the World Health Organization (WHO) as cardiovascular diseases, cancers, diabetes, and chronic respiratory diseases, NCDs represent a group of preventable diseases with complex social, economic, and environmental etiologies.[<xref rid="ref1" ref-type="bibr">1</xref><xref rid="ref3" ref-type="bibr">3</xref>] Considering their significant role in the global burden of death and disability, NCDs are believed to be the most serious world health challenge.[<xref rid="ref4" ref-type="bibr">4</xref>] NCDs account for 63% of mortality at global level, with 80% of NCD-related deaths are occurring in low- and middle-income countries.[<xref rid="ref5" ref-type="bibr">5</xref>] Although all countries are experiencing an increase in the rate of NCDs - affecting both genders and various socioeconomic groups[<xref rid="ref6" ref-type="bibr">6</xref>] - with more rapid escalating trend in low- and middle-income than in high-income and industrialized countries.[<xref rid="ref7" ref-type="bibr">7</xref>]</p><p>Although NCDs become symptomatic in adulthood, they originate from early life because of the persistence of lifestyle behaviors and tracking of biological risk factors from childhood into adulthood.[<xref rid="ref8" ref-type="bibr">8</xref><xref rid="ref9" ref-type="bibr">9</xref>] This is of special concern for the pediatric population of developing countries, who are facing rapid changes in lifestyle habits.[<xref rid="ref10" ref-type="bibr">10</xref>]</p><p>In 2001, the WHO, in collaboration with The Joint United Nations Program on HIV/AIDS, The United Nations Educational, Scientific and Cultural Organization, and The United Nations Children's Fund, and with technical assistance from the US Centers for Disease Control and Prevention, initiated development of the Global school-based student health survey (GSHS). Since 2003, Ministries of Health and Education of many countries are using the GSHS to periodically monitor the prevalence of important health risk behaviors and protective factors among students. The 10 core questionnaire modules included alcohol use, tobacco use, drug use, sexual behaviors, hygiene, dietary behaviors, mental health, physical activity, protective factors, and violence and unintentional injury.[<xref rid="ref11" ref-type="bibr">11</xref>]</p><p>Iranian children and adolescents alike the pediatric population of many other developing countries, are experiencing lifestyle change, and are being affected by risk factors of NCDs.[<xref rid="ref10" ref-type="bibr">10</xref>] From 2003 to 2004, a national school-based surveillance system has been implemented in Iran for health risk behaviors and risk factors.[<xref rid="ref10" ref-type="bibr">10</xref><xref rid="ref12" ref-type="bibr">12</xref><xref rid="ref13" ref-type="bibr">13</xref><xref rid="ref14" ref-type="bibr">14</xref><xref rid="ref15" ref-type="bibr">15</xref>] This program is entitled “Childhood and Adolescence Surveillance and PreventIon of Adult Noncommunicable disease (CASPIAN) study.” The surveys were repeated every 2 years, with blood sampling for biochemical factors every 4 years.</p><p>This paper presents the methods and primary findings of the fifth survey of this school-based surveillance program, i.e., the CASPIAN-V study.</p></sec><sec sec-type="methods" id="sec1-2"><title>METHODS</title><p>The CASPIAN-V study was conducted in 2015 in urban and rural areas of thirty provinces of Iran.</p><sec id="sec2-1"><title>Study population and sampling framework</title><p>The study population consisted of students aged 7–18 years in primary and secondary schools in urban and rural areas across the country. They were selected using multistage, stratified cluster sampling method.</p><p>Sampling within each province was conducted according to the student's place of residence (urban or rural) and level of education (primary and secondary) using the proportional to size method and with equal sex ratio. This means that the number of boys and girls was the same in each province, and their ratio in urban and rural areas was proportional to the number of students in urban and rural areas. Similarly, the number of samples between different grades in urban and rural areas was divided according to the number of students in each grade. Achieving the desired number of samples was obtained using cluster sampling in each province with equal cluster sizes.</p><p>Clusters were determined at school levels. The size of each cluster was ten students, which means that a total of 10 statistical units (including ten student and their parents) would be considered in each cluster. The sample size was 480 students in each province (48 clusters of 10 students), i.e., a total of 14,400 students at national level. This was the maximum sample size that helped achieving a good estimate of all risk factors of interest. In each province, 14 clusters out of 48 clusters were randomly selected for biochemical test, i.e., a total of 4200 students.</p></sec><sec id="sec2-2"><title>Procedure and measurements</title><sec id="sec3-1"><title>Questionnaires</title><p>0Two sets of questionnaires were considered for students and their parents. The student's questionnaire was obtained from the WHO-GSHS that was translated into Persian. The validity and reliability of questionnaires has been assessed previously.[<xref rid="ref15" ref-type="bibr">15</xref><xref rid="ref16" ref-type="bibr">16</xref>] An expert panel approved the face validity and in the phase of content validity assessment, the questions getting a score of more than 0.75 were affirmed to have appropriate content validity. Cronbach's alpha coefficient of the whole questionnaires was 0.97 and Pearson's correlation coefficient of the test–retest phase was 0.94, which confirmed the reliability of questionnaires.</p><p>After identifying eligible students, the mission and purpose of the interview was explained. It was explained that questions are related to their health status and health-related behaviors. The students were asked to tell what they know, and easily express if they do not know something.</p><p>Interviews were conducted in a peaceful environment, away from busy classrooms. Questions were read to students with simple words, and they could not see the questions. The whole process was supervised and controlled by a team of health-care professionals.</p><p>The questionnaire includes the following sections:</p><p><list list-type="bullet"><list-item><p>Relationship with friends</p></list-item><list-item><p>Body size</p></list-item><list-item><p>Students’ schools</p></list-item><list-item><p>Life satisfaction</p></list-item><list-item><p>Dietary habits</p></list-item><list-item><p>Health behaviors</p></list-item><list-item><p>Physical activity</p></list-item><list-item><p>Leisure time activities</p></list-item><list-item><p>Injuries</p></list-item><list-item><p>Violence</p></list-item><list-item><p>Bullying</p></list-item><list-item><p>Exposure to tobacco smoke</p></list-item><list-item><p>Counseling with family members</p></list-item><list-item><p>Perceived health status</p></list-item><list-item><p>Tobacco smoking</p></list-item><list-item><p>Academic performance</p></list-item><list-item><p>Sunlight exposure</p></list-item><list-item><p>Exposure to the green space and environmental pollution.</p></list-item></list></p><p>After identifying eligible students, their parents were also invited to complete the parent's questionnaire. The presence of at least one of the parents was necessary and sufficient. Parents were informed that questions are about health status and health-related behaviors in the students’ families.</p><p>Parents’ questionnaires included the following sections:</p><p><list list-type="bullet"><list-item><p>Family characteristics (household size, order of students, socioeconomic variables)</p></list-item><list-item><p>Past medical history of the student</p></list-item><list-item><p>Family medical history</p></list-item><list-item><p>Dietary habits</p></list-item><list-item><p>Leisure time activities</p></list-item><list-item><p>History of injuries to the students</p></list-item><list-item><p>Parents’ sleep pattern</p></list-item><list-item><p>Parents’ anthropometric measures.</p></list-item></list></p></sec><sec id="sec3-2"><title>Physical measurements</title><p>A team of trained health-care experts recorded information based on approved checklists; they performed the examinations under standard protocols using calibrated instruments. Weight was measured on a scale placed on a flat ground to the nearest 0.1 kg while participants wearing a light cloth, and height was measured without shoes to the nearest 0.1 cm.[<xref rid="ref16" ref-type="bibr">16</xref>] Body mass index (BMI) was calculated by dividing weight (kg) by height squared (m<sup>2</sup>). We used the WHO growth charts to categorize BMI.[<xref rid="ref17" ref-type="bibr">17</xref>] Waist circumference was measured using a nonelastic tape at a point midway between the lower border of the rib cage and the iliac crest at the end of normal expiration to the nearest 0.1 cm. Hip circumference was measured at the widest part of the hip at the level of the greater trochanter to the nearest 0.1 cm.[<xref rid="ref18" ref-type="bibr">18</xref>]</p><p>Wrist circumference was measured to the nearest 0.1 cm on the dominant arm using a tape meter. Participans were asked to hold their arm on a flat surface as a table. The superior border of the tape measure was placed just distal to the prominences of radial and ulnar bones. The wrist circumference was measured without the tape was too tight or too loose and with lying flat on the skin. Neck circumference was measured with an accuracy of 0.1 cm with the most prominent portion of the thyroid cartilage taken as a landmark. Blood pressure (BP) was measured in the sitting position on the right arm using a mercury sphygmomanometer with an appropriate cuff size. It was measured 2 times at 5 min intervals, and the average was registered.[<xref rid="ref19" ref-type="bibr">19</xref>]</p></sec><sec id="sec3-3"><title>Physical activity and leisure-time screen time</title><p>To assess the screen time (ST) behaviors, the number of hours per day that participants spent watching television (TV) and/or videos, personal computer, or electronic games were asked, and then the total cumulative spent time for ST was calculated.</p><p>Through a validated questionnaire, information of past week weekly frequency of leisure time physical activity outside the school was collected.[<xref rid="ref15" ref-type="bibr">15</xref>] Having enough physical activity was considered as at least 30 min duration of exercises per day that led to sweating and large increases in breathing or heart rate.</p></sec></sec><sec id="sec2-3"><title>Blood sampling</title><p>Eligible students were referred to the laboratory, while one of the parents accompanied him/her. Then, 6 mL venous blood sample was collected after 12 h overnight fasting. All collection tubes were centrifuged at 2500–3000 ×g for 10 min. Immediately after centrifugation, serum samples were aliquot into 200 μL tubes and stored at −70°C. All samples were transferred by cold chain to Isfahan Mahdieh Laboratory. Fasting blood glucose, triglycerides (TGs), total cholesterol (TC), low-density lipoprotein-cholesterol (LDL-C) and high-density lipoprotein-cholesterol (HDL-C), alanine aminotransferase, and creatinine were measured enzymatically by Hitachi Auto Analyzer (Tokyo, Japan).[<xref rid="ref20" ref-type="bibr">20</xref><xref rid="ref21" ref-type="bibr">21</xref>]</p></sec><sec id="sec2-4"><title>Definitions</title><p>We used the WHO growth curves to define BMI categories, i.e., underweight as age- and sex-specific BMI <5<sup>th</sup>, overweight as sex-specific BMI for age of 85<sup>th</sup>–95<sup>th</sup>, and obesity as sex-specific BMI for >95<sup>th</sup> . Abdominal obesity was defined as waist-to-height ratio equal to or more than 0.5.[<xref rid="ref22" ref-type="bibr">22</xref>]</p><p>Fasting blood sugar ≥100 mg/dl, serum TGs ≥100 mg/dl, TC ≥200 mg/dl, LDL-C ≥110 mg/dl, and HDL-C <40 mg/dl (except in boy 15–18 years mg/dl <45 mg/dl) were considered as abnormal.[<xref rid="ref23" ref-type="bibr">23</xref>] Elevated BP was defined as either high systolic BP (≥90<sup>th</sup> percentile for age, sex, and height) or high diastolic BP (≥90<sup>th</sup> percentile for age, sex, and height).[<xref rid="ref19" ref-type="bibr">19</xref>]</p></sec><sec id="sec2-5"><title>Ethical concerns</title><p>Study protocols were reviewed and approved by ethical committees and other relevant national regulatory organizations. The Research and Ethics Council of Isfahan University of Medical Sciences approved the study (Project Number: 194049). After complete explanation of the study objectives and protocols, written informed consent and verbal consent were obtained from the parents and students, respectively.</p></sec><sec id="sec2-6"><title>Statistical analysis</title><p>Data were analyzed using STATA package version 11.0 (Stata Statistical Software: Release 11. StataCorp LP. Package, College Station, TX, USA), and <italic>P</italic> < 0.05 was considered statistically significant. Data are expressed as the mean and standard deviation (SD) for continuous variables and as number (percentage) for categorical variables. The Student's t-test was used to compare mean differences between quantitative variables. Association between qualitative variables was assessed by the Pearson's Chi-square test. All statistical measures were estimated using survey data analysis methods.</p></sec></sec><sec sec-type="results" id="sec1-3"><title>RESULTS</title><p>Overall, 14274 students and one of their parents (out of 14,440) completed the survey (participation rate: 99%); for blood sampling from students, the participation rate was 91.5% (3843 out of 4200 students selected for blood sampling). The students consisted of 7046 (49.4%) girls and 7228 (50.6%) boys; 71.4% of students were from urban and 28.6% from rural areas. The mean (SD) age of participants was 12.3 (3.2) years. In total, 12.3% of fathers and 17.6% of mothers were illiterate. The large number of students’ father was worker or employee (44.8%), whereas 86.8% of mothers were homemakers. The characteristics of participants are presented in Tables <xref ref-type="table" rid="T1">1</xref> and <xref ref-type="table" rid="T2">2</xref> according to gender and living area, respectively.</p><table-wrap id="T1" position="float"><label>Table 1</label><caption><p>Characteristics of participants according to gender: The CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g001"></graphic></table-wrap><table-wrap id="T2" position="float"><label>Table 2</label><caption><p>Characteristics of participants according to living area: The CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g002"></graphic></table-wrap><p>Overall, 16.1% (17.4% of boys and 14.8% of girls) were underweight, and 20.8% had excess weight consisting of 9.4% (8.7% of boys and 10.2% of girls) of overweight and 11.4% (12.5% of boys and 10.3% of girls) of obesity. Abdominal obesity was documented in 21.1% of students (21.6% of boys and 20.5% of girls). Low HDL-C was the most prevalent abnormality of lipid profile (29.5%) followed by high serum TGs (27.7%) [<xref ref-type="table" rid="T3">Table 3</xref>].</p><table-wrap id="T3" position="float"><label>Table 3</label><caption><p>Prevalence of cardiometabolic risk factors in Iranian children and adolescents: The CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g003"></graphic></table-wrap><p><xref ref-type="table" rid="T4">Table 4</xref> shows some health and dietary behaviors reported by students or their parents. A total of 52% of students reported to brush their teeth once a day and 23.1% did more than once a day. Most families (59.9%) reported to consume whole wheat bread and the rest consumed refined bread. Hydrogenated solid oil and liquid oil were the most prevalent types of cooking oil in families (37.9% and 37.4%, respectively). Moreover, 57% of students reported that they never or rarely added salt to table food and the rest used it always or sometimes. Overall, 3.6% and 7.7% of students skipped breakfast during weekdays and weekends, respectively. Nearly 27.5% of students reported that they consumed junk foods every week, 25.7% consumed soft drinks every week, and 15.5% ate fast foods every week. Daily consumption of fresh fruits, vegetables, and milk among students was about 60%, 32%, and 40%, respectively [<xref ref-type="table" rid="T5">Table 5</xref>].</p><table-wrap id="T4" position="float"><label>Table 4</label><caption><p>Some dietary behaviors in Iranian children and adolescents: CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g004"></graphic></table-wrap><table-wrap id="T5" position="float"><label>Table 5</label><caption><p>Consumption frequency of some healthy and junk foods in Iranian children and adolescents: CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g005"></graphic></table-wrap><p><xref ref-type="table" rid="T6">Table 6</xref> shows physical activity and leisure time activities among students. According to reports by students, 13.7% had at least 30 min daily leisure time physical activity; however, 7.4% reported not to have any leisure time physical activity. Most students reported that they watched TV for 1 h during weekdays and 2 h during weekends (39% and 30%, respectively).</p><table-wrap id="T6" position="float"><label>Table 6</label><caption><p>Physical activity and screen time pattern of study participants: The CASPIAN-V study</p></caption><graphic xlink:href="IJPVM-8-4-g006"></graphic></table-wrap><p>A total of 62% and 48% of students reported that they did not use personal computer during weekdays and weekends, respectively. Most students (about 50%) attended sports sessions in the school for 2 h/week. Use of school service and walking to school was approximately equal among students (39% and 38%, respectively). Mean (SD) of sleep duration was 8.4 (1.3) h in weekdays and 9.6 (1.6) h in weekends.</p></sec><sec sec-type="discussion" id="sec1-4"><title>DISCUSSION</title><p>The current survey provided a general insight on some health-related risk behaviors and biological risk factors in a nationally representative sample of Iranian children and adolescents. The general health status was appropriate; however, some unhealthy lifestyle habits, in terms of junk food consumption and sedentary leisure time activities, as well as relatively high prevalence of excess weight and dyslipidemia deserve more attention.</p><p>Now, at the beginning of the third millennium, NCDs are encompassing populations all around the world. By 2020, NCDs will be the cause seven out of every ten deaths in developing countries.[<xref rid="ref24" ref-type="bibr">24</xref>] This fact has led to introducing significant methods and surveys to assess the prevalence of NCDs and their risk factors. Because of the importance of primordial/primary prevention of NCDs and their risk factors, especially in developing countries, the surveys of the CASPIAN study have been performed in Iran since 2003.[<xref rid="ref11" ref-type="bibr">11</xref><xref rid="ref12" ref-type="bibr">12</xref><xref rid="ref13" ref-type="bibr">13</xref><xref rid="ref14" ref-type="bibr">14</xref><xref rid="ref15" ref-type="bibr">15</xref>] The current study is the fifth phase of these studies which was done with the objective of obtaining new data regarding NCDs and their risk factors among Iranian students and also to compare our findings with the former CASPIAN studies and with existing literature on this matter. This national study will give us new insight and data to take necessary actions and interventions required, regarding the improvement of health, as well as preventing chronic and noncommunicable diseases.</p><p>One of the factors investigated by the current study was the weight status of children and adolescents. Our findings revealed a double burden of nutritional disorders in terms of underweight and excess weight. The prevalence of overweight and obesity was higher in urban regions compared to rural regions, which may indicate having a high-calorie low-nutrient diet such as fast foods in urban areas. Although this shows that policies concerning reducing being overweight and obese seem to have worked out well, still more than 20% of participants reported to be either overweight or obese. Actually, many countries around the world are facing a marked increase in the prevalence of childhood obesity.[<xref rid="ref25" ref-type="bibr">25</xref><xref rid="ref26" ref-type="bibr">26</xref><xref rid="ref27" ref-type="bibr">27</xref><xref rid="ref28" ref-type="bibr">28</xref><xref rid="ref29" ref-type="bibr">29</xref><xref rid="ref30" ref-type="bibr">30</xref><xref rid="ref31" ref-type="bibr">31</xref>] A multinational study from 34 countries surveyed 162,305 school-aged participants, aged 10–16 years. They showed that national overweight and obesity differ from one region to another. The rate of overweight and obesity among youth was more than 15% in North America, Britain, and Southern portion of Western Europe. The prevalence of being overweight varied from 5.1% to 25.4% in different countries.[<xref rid="ref30" ref-type="bibr">30</xref>] Another multinational study among 21 countries reported that the prevalence of overweight in adolescents, aged 14–17 years varied from 8% in Slovenia to 23% in Greece.[<xref rid="ref32" ref-type="bibr">32</xref>] In a study performed in Saudi Arabia among 13–18-year-old adolescents, the mean BMI was 27.43 kg/m<sup>2</sup> and 44.6% of the adolescents were reported to be overweight .[<xref rid="ref33" ref-type="bibr">33</xref>] In a review on childhood obesity in the Middle-East, Iran is considered among countries had the lowest rate of childhood obesity in this region. It was also stated that high prevalence of childhood obesity in the Middle-East should be considered by policymakers in the region to set up effective national and regional surveillance systems.[<xref rid="ref34" ref-type="bibr">34</xref>] Although the prevalence of childhood obesity in Iran is not as high as some other Middle-Eastern countries, its escalating trend, notably in young children, is of great concern.[<xref rid="ref29" ref-type="bibr">29</xref>] It also should be noted that the BMI of about 16% of participants was lower than normal limit. The coexistence of relatively high prevalence of underweight and overweight is consistent with other Middle-Eastern pediatric population.[<xref rid="ref35" ref-type="bibr">35</xref>]</p><p>The dietary behaviors of participants revealed some healthy and some unhealthy habits. Change of dietary habits from traditional foods to Western foods and tendency to junk foods are frequently reported from developing countries.[<xref rid="ref36" ref-type="bibr">36</xref><xref rid="ref37" ref-type="bibr">37</xref>] In the current study, the consumption of was higher than the previous surveys of the CASPIAN-IV and III studies which was reported to be refined bread. In CASPIAN-III and IV studies, more than 50% of families reported to use hydrogenated solid fat, which is considerably lower (around 40%) in the current study which may indicate improving dietary habits. Moreover, 21% of participants reported that they always added salt to the table food, which is considerably lower than CASPIAN-III (33%) and CASPIAN-IV (31%) studies. These improvements in dietary habits might suggest the effectiveness of community-based interventions on increasing the public awareness regarding the adverse health effects of excess salt intake. Food composition in the diet of some Middle-Eastern population contains high amounts of sodium,[<xref rid="ref37" ref-type="bibr">37</xref>] and reducing salt intake in various age groups including children and adolescents should be considered in health programs. Moreover, in the current survey, the use of fresh fruits was higher than the CASPIAN-IV study, even though the same could not be said about the daily use of fresh vegetables. Overall, it seems that families tend to use healthier diets compared to previous years.</p><p>By deploying of technology and rapid changes in leisure time activities, the time spent on sedentary entertainments has increased in children and adolescents of different populations.[<xref rid="ref30" ref-type="bibr">30</xref><xref rid="ref38" ref-type="bibr">38</xref>] In the current study, 7.4% of participants did not have any kind of physical activity, neither on weekdays nor the weekends, which was lower than CASPIAN-IV and much lower than CASPIAN-III studies. Most participants reported that they had once and twice a week physical activity (about 20% for each group). The pattern of physical activity was nearly similar in different age groups albeit high school students seemed to be less physically active compared to elementary students, which might be due to the fact that high school students have less free time considering the difficulty of their studies. About leisure time activities, most participants were in the 1 h/day groups for both doing homework and watching TV, whereas more than 60% of participants reported a negative history of playing computer games. In most countries, reduced physical activity and watching more TV were associated with being overweight and obese.[<xref rid="ref30" ref-type="bibr">30</xref><xref rid="ref39" ref-type="bibr">39</xref><xref rid="ref40" ref-type="bibr">40</xref>] Hong <italic>et al</italic>.[<xref rid="ref41" ref-type="bibr">41</xref>] indicated that physical activity lowered the risk of obesity and that obese had functional limitations in comparison with normal-weight children.</p><p>In our study, mean (SD) of sleep duration was 8.4 (1.3) h in weekdays and 9.6 (1.6) h in weekends, which could be considered sufficient. This is of high significance as children who have prolonged ST such as watching TV and playing computer games are more likely to have poor sleep and problem behaviors.[<xref rid="ref42" ref-type="bibr">42</xref>]</p><p>Similar to previous surveys of the CASPIAN study, we found the considerably high prevalence of dyslipidemia, mainly low HDL-C and hypertriglyceridemia, i.e., the components of metabolic syndrome, in children and adolescents. In addition to genetic predisposition, this kind of dyslipidemia might be a result of unhealthy lifestyle habits.</p><sec id="sec2-7"><title>Study limitations and strengths</title><p>The cross-sectional design of this study is its’ main limitation by which causality cannot be determined. The second limitation is that our survey questionnaire-based study. Despite these limitations, the major strengths of this survey are the large sample size and the nationwide design of the study, which ensures the representativeness of the findings and providing the possibility of making comparisons with previous phases of the CASPIAN study. Finally, a high-quality control of data collection was the other strength of this study.</p></sec></sec><sec sec-type="conclusions" id="sec1-5"><title>CONCLUSIONS</title><p>Considering the importance of preventable lifestyle behaviors and risk factors resulting of as well as the preventable nature of NCDs, the CASPIAN-V study gives us new insight and data to improve public health and making national policies to do proper interventions for reducing NCDs. 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