Mellanby A R, Phelps F A, Crichton N J, Tripp J H
Department of Child Health, Post Graduate Medical School, University of Exeter.
BMJ. 1995 Aug 12;311(7002):414-7. doi: 10.1136/bmj.311.7002.414.
To develop and teach a school sex education programme that will lead to a decrease in sexual activity.
A matched internal and external control experiment, comparing control populations which received their own sex education programmes with populations which received a novel sex education intervention that included medical and peer led teaching.
Comprehensive secondary schools; control and intervention populations within Devon, and distant controls from rural, semiurban, and urban areas of England excluding major conurbations.
Schoolchildren were taught from age 12 to 16; three successive cohorts of students were evaluated in school year 11 (mean age 16.0).
Questionnaire conducted under "examination conditions" and invigilated by the research team and other trained medical staff.
In the intervention population, progressive increase in knowledge related to contraception, sexually transmitted diseases, and prevalence of sexual activity (chi 2 (trend) P < 0.001 for all three series); relative increase between intervention and control populations in knowledge, relative decrease in attitudes suggesting that sexual intercourse is of itself beneficial to teenagers and their relationships, relative decrease in sexual activity, and relative increase in approval of their "sex education" (relative risk > 1.00 with 95% confidence limits not including 1.00 for all series and for comparisons with both control populations); odds ratio (control v programme) for sexual activity of 1.45, controlling for sociodemographic variables.
School sex education that includes specific targeted methods with the direct use of medical staff and peers can produce behavioural changes that lead to health benefit.
制定并讲授一项学校性教育计划，以减少性行为。
一项配对的内部和外部对照实验，将接受自身性教育计划的对照人群与接受包括医学和同伴主导教学的新型性教育干预措施的人群进行比较。
综合中学；德文郡内的对照人群和干预人群，以及来自英格兰农村、半城市和城市地区（不包括主要城市集聚区）的远距离对照人群。
对12至16岁的学童进行授课；在11年级（平均年龄16.0岁）对连续三个队列的学生进行评估。
在“考试条件”下由研究团队和其他经过培训的医务人员监考进行问卷调查。
在干预人群中，与避孕、性传播疾病和性行为发生率相关的知识逐步增加（所有三个系列的趋势χ2检验P<0.001）；干预人群与对照人群相比，知识相对增加，认为性交本身对青少年及其关系有益的态度相对下降，性行为相对减少，对其“性教育”的认可相对增加（所有系列以及与两个对照人群的比较，相对风险>1.00，95%置信区间不包括1.00）；控制社会人口统计学变量后，性行为的优势比（对照与计划）为1.45。
包括直接利用医务人员和同伴的特定针对性方法的学校性教育可产生导致健康益处的行为改变。
