Adolescent sexual practices have been widely investigated as experiences that pose potential risks for health. The present study, therefore, aimed to investigate individual and contextual factors associated with sexual initiation, sexual activity before the age of 15 years, and inconsistent condom use. A total of 253 adolescents aged 11 to 18 years, from public schools in the capital and metropolitan region of Rio Grande do Sul, were interviewed. They answered a questionnaire covering sociodemographic data and sexual behaviors and completed the Perception of Family Support Inventory. The data were analyzed through descriptive and inferential statistics and it was verified that both individual (higher level of education, school repetition, and use of licit and illicit substances) and contextual factors (perception of less affective-consistent support and greater autonomy from the family) were related to sexual initiation among adolescents. The associations found for the groups with sexual initiation before and after 15 years of age were similar, indicating that age did not increase the exposure to risks. Inconsistent condom use was related to the use of tobacco and other drugs. Taken together, the results indicated the co-occurrence of risk behaviors, such as sexual risks and substance abuse, as well as highlighting some family characteristics as protective factors.

中文翻译：

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与青少年性行为起始相关的个体和背景因素

青少年性行为已被广泛调查为对健康构成潜在风险的经历。因此，本研究旨在调查与性开始、15 岁之前的性活动以及不一致的安全套使用相关的个体和背景因素。共有 253 名来自南里奥格兰德州首都和大都市区公立学校的 11 至 18 岁青少年接受了采访。他们回答了一份涵盖社会人口统计数据和性行为的调查问卷，并完成了家庭支持感知调查表。通过描述性和推论性统计对数据进行了分析，并验证了个人（较高的教育水平、留级以及使用合法和非法物质）和背景因素（对情感一致性支持较少和家庭更大自主权的看法） ）与青少年的性开始有关。在 15 岁之前和之后开始性行为的群体中发现的关联相似，表明年龄不会增加风险暴露。安全套使用不一致与烟草和其他药物的使用有关。总而言之，结果表明风险行为（例如性风险和药物滥用）同时发生，并强调了一些家庭特征作为保护因素。