Warren C W, Santelli J S, Everett S A, Kann L, Collins J L, Cassell C, Morris L, Kolbe L J
Surveillance Research Section, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA.
Fam Plann Perspect. 1998 Jul-Aug;30(4):170-2, 200.
High rates of unintended pregnancy and sexually transmitted diseases (STDs), including HIV infection, among adolescents are major public health concerns that have created interest in trends in teenage sexual activity.
Nationally representative data from Youth Risk Behavior Surveys conducted in 1990, 1991, 1993 and 1995 are used to examine levels of sexual experience, age at first intercourse, current sexual activity and condom use at last intercourse among students in grades 9-12.
The proportion of students who reported being sexually experienced remained at 53-54% from 1990 through 1995, while the percentage of sexually active students who used condoms at last intercourse rose from 46% to 54% between 1991 and 1995. Black students were more likely than white students to report being sexually experienced, being currently sexually active and having had four or more lifetime sexual partners; black students also reported a significantly younger age at first intercourse. Gender differences in sexual behavior were found more frequently among black students than among white or Hispanic students.
Although levels of sexual experience for high school students in the United States have not risen during the 1990s, a very high percentage of students continue to be at risk for unintended pregnancy and STDs, including HIV infection.
青少年意外怀孕和包括艾滋病毒感染在内的性传播疾病（STD）的高发病率是主要的公共卫生问题，这引发了人们对青少年性行为趋势的关注。
使用1990年、1991年、1993年和1995年进行的青少年风险行为调查的全国代表性数据，来研究9至12年级学生的性经历水平、首次性交年龄、当前性活动以及最近一次性交时使用避孕套的情况。
从1990年到1995年，报告有性经历的学生比例维持在53%至54%，而在最近一次性交时使用避孕套的性活跃学生比例在1991年至1995年间从46%升至54%。黑人学生比白人学生更有可能报告有性经历、当前有性活动以及一生中有四个或更多性伴侣；黑人学生还报告首次性交的年龄明显更小。黑人学生性行为中的性别差异比白人或西班牙裔学生更为常见。
尽管20世纪90年代美国高中生的性经历水平没有上升，但仍有很高比例的学生继续面临意外怀孕和包括艾滋病毒感染在内的性传播疾病的风险。
