Paz-Bailey Gabriela, Koumans Emilia H, Sternberg Maya, Pierce Antonya, Papp John, Unger Elizabeth R, Sawyer Mary, Black Carolyn M, Markowitz Lauri E
National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Arch Pediatr Adolesc Med. 2005 Jun;159(6):536-42. doi: 10.1001/archpedi.159.6.536.
To evaluate the relationship between self-reported correct and consistent condom use and chlamydial and gonococcal infection.
Cross-sectional study.
An urban adolescent health care clinic. Patients A total of 509 adolescent girls tested for Chlamydia trachomatis and Neisseria gonorrhoeae infection by urine nucleic acid amplification tests. Main Outcome Measure Effect of condom use on infection rates of chlamydia and gonorrhea. Consistent condom use was defined as using condoms for every act of vaginal sex and correct use as consistent use without any of the following: beginning sex without a condom, taking it off before finishing sex, flipping it over, condom breakage, or condom slippage.
A total of 95% of the participants were African American, with a mean age of 16.6 years. Chlamydia prevalence was 21% (105/509) and gonorrhea prevalence was 7% (36/509). Condom errors were reported by 316 (71%) of 442 participants who had reported using a condom at least once in the previous 3 months. Consistent use was reported by 176 patients (35%); however, both correct and consistent use was reported by only 80 patients (16%). After adjusting for confounders, correct and consistent use was protective for chlamydia (odds ratio, 0.4; 95% confidence interval, 0.2-1.0) and highly protective for gonorrhea (odds ratio, 0.1; 95% confidence interval, 0-0.7).
Our findings indicate that assessing both correctness and consistency of use is important for evaluation of condom effectiveness.
评估自我报告的正确且持续使用避孕套与衣原体和淋病感染之间的关系。
横断面研究。
一家城市青少年医疗诊所。患者 共有509名青春期女孩通过尿液核酸扩增试验检测沙眼衣原体和淋病奈瑟菌感染。主要观察指标 避孕套使用对衣原体和淋病感染率的影响。持续使用避孕套定义为每次阴道性行为都使用避孕套，正确使用定义为持续使用且无以下任何情况：无避孕套开始性行为、性行为结束前取下避孕套、翻转避孕套、避孕套破裂或避孕套滑落。
共有95%的参与者为非裔美国人，平均年龄为16.6岁。衣原体患病率为21%（105/509），淋病患病率为7%（36/509）。在之前3个月内至少报告使用过一次避孕套的442名参与者中，有316名（71%）报告了避孕套使用错误。176名患者（35%）报告持续使用；然而，只有80名患者（16%）报告正确且持续使用。在对混杂因素进行调整后，正确且持续使用对衣原体具有保护作用（优势比，0.4；95%置信区间，0.2 - 1.0），对淋病具有高度保护作用（优势比，0.1；95%置信区间，0 - 0.7）。
我们的研究结果表明，评估使用的正确性和持续性对于评估避孕套有效性很重要。
