MMWR Morb Mortal Wkly Rep. 2002 Sep 27;51(38):856-9.
Unprotected sexual intercourse places young persons at risk for human immunodeficiency virus (HIV) infection, other sexually transmitted diseases (STDs), and unintended pregnancy. Responsible sexual behavior among adolescents is one of the 10 leading health indicators of the national health objectives for 2010 (objective 25.11). To examine changes in sexual risk behavior that occurred among high school students in the United States during 1991-2001, CDC analyzed data from six national Youth Risk Behavior surveys (YRBS). This report summarizes the results of the analysis, which indicate that, during 1991-2001, the percentage of U.S. high school students who ever had sexual intercourse and the percentage who had multiple sex partners decreased. Among students who are currently sexually active, the prevalence of condom use increased, although it has leveled off since 1999. However, the percentage of these students who used alcohol or drugs before last sexual intercourse increased. Despite decreases in some sexual risk behaviors, efforts to prevent sexual risk behaviors will need to be intensified to meet the national health objective for responsible sexual behavior.
无保护性行为使年轻人面临感染人类免疫缺陷病毒（HIV）、其他性传播疾病（STD）以及意外怀孕的风险。青少年的负责任性行为是2010年国家健康目标的10项主要健康指标之一（目标25.11）。为了研究1991 - 2001年期间美国高中生发生的性风险行为变化，美国疾病控制与预防中心（CDC）分析了六项全国青少年风险行为调查（YRBS）的数据。本报告总结了分析结果，结果表明，在1991 - 2001年期间，曾经有过性行为的美国高中生比例以及有多个性伴侣的比例有所下降。在目前有性行为的学生中，避孕套的使用比例有所上升，尽管自1999年以来趋于平稳。然而，在这些学生中，上次性行为前饮酒或吸毒的比例有所增加。尽管某些性风险行为有所减少，但仍需加大预防性风险行为的力度，以实现负责任性行为的国家健康目标。
