{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T16:33:25Z","timestamp":1757608405527,"version":"3.44.0"},"reference-count":31,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["J Fam Plann Reprod Health Care"],"accepted":{"date-parts":[[2013,8,15]]},"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>To compare the prevalence of demographic characteristics and sexual behaviours across age groups and to estimate their significance in predicting sexual risk factors by age cohort.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>This cohort study examined sexually transmitted infection (STI) prevalence among heterosexual men in Brazil, Mexico and the USA (<jats:italic>N<\/jats:italic>=3047). Participants completed a sexual risk factor questionnaire and were tested for chlamydia, gonorrhoea, syphilis and genital herpes. We examined sexual risk in the study population through a composite measure of STI positivity by age cohort (young: 18\u201330\u2005years; middle-aged: 31\u201344\u2005years; older: 45\u201370\u2005years). Multivariable logistic regression models were used to generate adjusted odds ratios (AORs) and 95% confidence intervals (CIs).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>We found that STI positivity varied significantly by age group among heterosexual men by a number of covariates. In younger men, having more advanced education had a protective effect (16\u2005years: AOR=0.37, 95% CI 0.15\u2013 0.92), whereas higher numbers of sexual partners elevated the risk for STIs (20\u201349 partners: AOR=2.06, 95% CI 1.04\u20134.06; \u226550 partners: AOR=4.33, 95% CI 1.74\u201310.76). Middle-aged men who were black (AOR=1.64, 95% CI 1.10\u20132.42) and divorced\/separated\/widowed (AOR=1.91, 95% CI 1.21\u20133.02) had an increased risk for a positive STI test. Among older men, a younger age at first vaginal sexual encounter (AOR=3.75, 95% CI 1.45\u20139.74) and a history of exchanging sex for money or drugs heightened STI risk (AOR=2.30, 95% CI 1.0\u20135.04).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>These findings demonstrate that age-related life experiences among heterosexual men influence sexual risk and STI transmission. This topic warrants further investigation to support the development and implementation of targeted interventions that may potentially reduce adverse sexual health outcomes.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/jfprhc-2012-100564","type":"journal-article","created":{"date-parts":[[2013,10,7]],"date-time":"2013-10-07T20:17:23Z","timestamp":1381177043000},"page":"261-269","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Age-related variation in sexual behaviours among heterosexual men residing in Brazil, Mexico and the USA"],"prefix":"10.1136","volume":"40","author":[{"given":"Euna M","family":"August","sequence":"first","affiliation":[{"name":"Research Coordinator, Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ellen","family":"Daley","sequence":"additional","affiliation":[{"name":"Associate Professor, Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeffrey","family":"Kromrey","sequence":"additional","affiliation":[{"name":"Professor, Department of Educational Measurement and Research, College of Education, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julie","family":"Baldwin","sequence":"additional","affiliation":[{"name":"Professor, Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nancy","family":"Romero-Daza","sequence":"additional","affiliation":[{"name":"Associate Professor, Department of Anthropology, College of Arts and Sciences, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jorge","family":"Salmeron","sequence":"additional","affiliation":[{"name":"Professor, Unidad de Investigaci\u00f3n Epidemiol\u00f3gica en Servicios de Salud, Instituto Mexicano del Seguro Social, Cuernavaca, Morelos, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eduardo","family":"Lazcano-Ponce","sequence":"additional","affiliation":[{"name":"Director, Centro de Investigaci\u00f3n Salud Poblacional, Instituto Nacional de Salud P\u00fablica, Cuernavaca, Morelos, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luisa L","family":"Villa","sequence":"additional","affiliation":[{"name":"Professor, Faculty of Medical Sciences of Santa Casa of S\u00e3o Paulo, S\u00e3o Paulo, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carol A","family":"Bryant","sequence":"additional","affiliation":[{"name":"Distinguished Professor, Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna R","family":"Giuliano","sequence":"additional","affiliation":[{"name":"Director, Center for Infection Research in Cancer, H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 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Unsafe sex. In: Ezzati M Lopez AD Rodgers A Murray CJL ( eds), Comparative Quantification of Health Risks: Global and Regional Burden of Diseases Attributable to Selected Major Risk Factors (Vols 1\u20133). Geneva, Switzerland: World Health Organization, 2005:1177\u20131254."},{"key":"2025090221312025000_40.4.261.21","doi-asserted-by":"crossref","unstructured":"Akogbe GO Ajidahun A Sirak B . Race and prevalence of human papillomavirus infection among men residing in Brazil, Mexico and the United States. 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