{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T14:16:14Z","timestamp":1784556974611,"version":"3.55.0"},"reference-count":96,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,3,14]],"date-time":"2020-03-14T00:00:00Z","timestamp":1584144000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Youths and adolescents are vulnerable to HIV\/STIs from unprotected sex. Promotion of young population\u2019s awareness about risky sexual behaviors is essential to develop contextualized interventions. A cross-sectional study was conducted in five Vietnamese provinces to document current attitudes and practices regarding sexual behaviors among youths. The information on sociodemographic characteristics, substance use, and sexual behaviors was collected via self-reported questionnaires. The factors associated with risky sexual behaviors were identified by the multivariate logistic regression. Among the 1200 participants, 73.5% reported having sex in their lifetime, and 48.1% used condoms at their latest sexual intercourse. Participants in urban areas were more likely not to intend to use condoms and had a higher unintended pregnancy rate than in rural areas. Older age was positively associated with not wanting to use and not using condoms. Substance-using participants were more likely to not use condoms. The participants taking alcohol or other stimulants before sex had a higher likelihood of unintended pregnancy. Respondents\u2019 attitudes and practices regarding sexual behaviors were associated with gender and employment. This study indicated that young population\u2019s awareness in Vietnam is high, however, risky sexual behaviors also remain common. Sex-related educational programs about the consequences of substance use, multiple sex partners, and unprotected sex should be developed.<\/jats:p>","DOI":"10.3390\/ijerph17061903","type":"journal-article","created":{"date-parts":[[2020,3,18]],"date-time":"2020-03-18T08:13:27Z","timestamp":1584519207000},"page":"1903","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Patterns of Risky Sexual Behaviors and Associated Factors among Youths and Adolescents in Vietnam"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1975-529X","authenticated-orcid":false,"given":"Ha","family":"Ngoc Do","sequence":"first","affiliation":[{"name":"Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7496-0336","authenticated-orcid":false,"given":"Diep","family":"Ngoc Nguyen","sequence":"additional","affiliation":[{"name":"Institute for Global Health Innovations, Duy Tan University, Da Nang 550000, Vietnam"},{"name":"Faculty of Pharmacy, Duy Tan University, Da Nang 550000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4570-2535","authenticated-orcid":false,"given":"Hoa","family":"Quynh Thi Nguyen","sequence":"additional","affiliation":[{"name":"Department of Research on Youth Culture and Lifestyle, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anh","family":"Tuan Nguyen","sequence":"additional","affiliation":[{"name":"Department of Research on Youth Culture and Lifestyle, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiep","family":"Duy Nguyen","sequence":"additional","affiliation":[{"name":"Department of Research on Children\u2019s issues, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thanh","family":"Phuong Bui","sequence":"additional","affiliation":[{"name":"Department of Research on Children\u2019s issues, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thao","family":"Bich Thi Vu","sequence":"additional","affiliation":[{"name":"Department of Research on Youth\u2019s Organisations and Youth Campaign, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Khiet","family":"Thanh Le","sequence":"additional","affiliation":[{"name":"Department of Research on Youth\u2019s Organisations and Youth Campaign, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dung","family":"Tuan Nguyen","sequence":"additional","affiliation":[{"name":"Department of Research on Youth and Legal issues, Youth Research Institute, Ho Chi Minh Communist Youth Union, Hanoi 100000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cuong","family":"Tat Nguyen","sequence":"additional","affiliation":[{"name":"Institute for Global Health Innovations, Duy Tan University, Da Nang 550000, Vietnam"},{"name":"Faculty of Medicine, Duy Tan University, Da Nang 550000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linh","family":"Gia Vu","sequence":"additional","affiliation":[{"name":"Center of Excellence in Evidence-based Medicine, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giang","family":"Thu Vu","sequence":"additional","affiliation":[{"name":"Center of Excellence in Evidence-based Medicine, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7827-8449","authenticated-orcid":false,"given":"Bach","family":"Xuan Tran","sequence":"additional","affiliation":[{"name":"Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi 100000, Vietnam"},{"name":"Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7931-2116","authenticated-orcid":false,"given":"Carl","family":"A. 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Ho","sequence":"additional","affiliation":[{"name":"Department of Psychological Medicine, National University Hospital, Singapore 119074, Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,14]]},"reference":[{"key":"ref_1","unstructured":"Kirby, D., Laris, B.A., and Rolleri, L. (2005). Impact of Sex and HIV Education Programs on Sexual Behaviors of Youth in Developing and Developed Countries, Family Health International, Youthnet program."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1429","DOI":"10.1037\/a0027547","article-title":"Marijuana use and risky sexual behavior among high-risk adolescents: Trajectories, risk factors, and event-level relationships","volume":"48","author":"Bryan","year":"2012","journal-title":"Dev. 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