Fortenberry J Dennis, Tu Wanzhu, Harezlak Jaroslaw, Katz Barry P, Orr Donald P
Section of Adolescent Medicine, Division of Biostatistics, and the Regenstrief Institute for Health Care, Indiana University School of Medicine, Indianapolis, USA.
Am J Public Health. 2002 Feb;92(2):211-3. doi: 10.2105/ajph.92.2.211.
This study sought to describe condom use over time in new and established adolescent relationships.
The outcome variable was time (in days) until first unprotected coital event. Analyses involved comparisons of Kaplan-Meier survival curves and Cox proportional hazards models.
Survival functions for the 2 relationship groups were significantly different. However, by 21 days the curves had converged: 43% of new and 41% of established relationships involved no unprotected coital events. Time to first unprotected coital event was significantly longer in new than in established relationships.
Prolongation of condom use in ongoing relationships may be a useful intervention to prevent sexually transmitted diseases.
本研究旨在描述在新建立的和已确立的青少年恋爱关系中随着时间推移避孕套的使用情况。
结果变量为距离首次无保护性交事件的时间(以天为单位)。分析包括对Kaplan-Meier生存曲线和Cox比例风险模型的比较。
两个恋爱关系组的生存函数存在显著差异。然而,到21天时曲线已趋同:新恋爱关系中有43%、已确立恋爱关系中有41%未发生无保护性交事件。新恋爱关系中距离首次无保护性交事件的时间显著长于已确立恋爱关系。
在持续的恋爱关系中延长避孕套的使用时间可能是预防性传播疾病的一项有效干预措施。