{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T17:30:57Z","timestamp":1770485457907,"version":"3.49.0"},"reference-count":33,"publisher":"CSIRO Publishing","issue":"4","license":[{"start":{"date-parts":[[2025,8,29]],"date-time":"2025-08-29T00:00:00Z","timestamp":1756425600000},"content-version":"vor","delay-in-days":4019,"URL":"https:\/\/doi.org\/10.1071\/journalslicense"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2014,9,9]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Age at first sex (AFS) is associated with adverse outcomes. We explore associated factors and correlates of \u2018early\u2019 AFS (&amp;lt;16 years). Methods: In 2009\u201311, participants (16\u201329 years) were recruited. Multivariate Cox regression explored correlates of AFS. Logistic regression analysis explored associations between early AFS and risk behaviours. Results: Of 3563 participants, 79% were sexually active. Median AFS was 17 years. Compared with those aged 25\u201329 years, younger participants reported younger AFS [16\u201317 years: adjusted hazard ratio (AHR) = 1.87, P &amp;lt; 0.01; 18\u201319 years: AHR = 1.47, P &amp;lt; 0.01, 20\u201324 years: AHR = 1.19, P &amp;lt; 0.01]. Of those sexually active, 29% reported early AFS. Early AFS was associated with being male [adjusted odds ratio (AOR) = 1.25, P &amp;lt; 0.05], being younger (16\u201317 years: AOR = 11.10, P &amp;lt; 0.01; 18\u201319 years: AOR = 3.60, P &amp;lt; 0.01; 20\u201324 years: AOR = 1.83, P &amp;lt; 0.01; compared with 25\u201329 years), having no education after high school (AOR = 1.52, P &amp;lt; 0.01), living alone (AOR = 1.84, P &amp;lt; 0.01) or with a partner (AOR = 1.57, P = 0.01), having more than five lifetime sex partners (AOR = 3.22, P = 0.01), inconsistent condom use in the past 12 months (AOR = 1.43, P &amp;lt; 0.01), ever using illicit drugs (AOR = 1.69, P &amp;lt; 0.01) and ever injecting drugs (AOR = 3.45, P &amp;lt; 0.01). Conclusions: The results highlight the importance of comprehensive sex education.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1071\/sh14058","type":"journal-article","created":{"date-parts":[[2014,8,27]],"date-time":"2014-08-27T20:05:16Z","timestamp":1409169916000},"page":"359-365","source":"Crossref","is-referenced-by-count":5,"title":["Early age at first sex: associations with sexual health and sociodemographic factors among a sample of young music festival attendees in Melbourne"],"prefix":"10.1071","volume":"11","author":[{"given":"Alyce M.","family":"Vella","sequence":"first","affiliation":[{"name":"ACentre for Population Health, Burnet Institute, 85 Commercial Road, Melbourne, Vic. 3004, Australia."},{"name":"CCorresponding author. Email: alyce@burnet.edu.au"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paul A.","family":"Agius","sequence":"additional","affiliation":[{"name":"ACentre for Population Health, Burnet Institute, 85 Commercial Road, Melbourne, Vic. 3004, Australia."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna L.","family":"Bowring","sequence":"additional","affiliation":[{"name":"ACentre for Population Health, Burnet Institute, 85 Commercial Road, Melbourne, Vic. 3004, Australia."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Margaret E.","family":"Hellard","sequence":"additional","affiliation":[{"name":"ACentre for Population Health, Burnet Institute, 85 Commercial Road, Melbourne, Vic. 3004, Australia."},{"name":"BDepartment of Epidemiology and Preventive Medicine, Monash University, 99 Commercial Road, Melbourne, Vic. 3004, Australia."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Megan S. C.","family":"Lim","sequence":"additional","affiliation":[{"name":"ACentre for Population Health, Burnet Institute, 85 Commercial Road, Melbourne, Vic. 3004, Australia."},{"name":"BDepartment of Epidemiology and Preventive Medicine, Monash University, 99 Commercial Road, Melbourne, Vic. 3004, Australia."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"67","published-online":{"date-parts":[[2014,8,28]]},"reference":[{"key":"2025102617104488800_R1","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1016\/S0950-3552(96)80067-8","article-title":"Sexual behaviour in young people.","volume":"10","author":"Wellings","year":"1996","journal-title":"Baillieres Clin Obstet Gynaecol"},{"key":"2025102617104488800_R2","doi-asserted-by":"publisher","first-page":"281","DOI":"10.1016\/j.whi.2007.06.003","article-title":"Associations of self-reported violence with age at menarche, first intercourse, and first birth among a national population sample of young Australian 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