Division of Clinical Research, Department of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110, USA.
Am J Obstet Gynecol. 2012 Jun;206(6):479.e1-9. doi: 10.1016/j.ajog.2012.04.012. Epub 2012 Apr 6.
The purpose of this study was to determine women's knowledge of contraceptive effectiveness.
We performed a cross-sectional analysis of a contraceptive knowledge questionnaire that had been completed by 4144 women who were enrolled in the Contraceptive CHOICE Project before they received comprehensive contraceptive counseling and chose their method. For each contraceptive method, women were asked "what percentage would get pregnant in a year: <1%, 1-5%, 6-10%, >10%, don't know."
Overall, 86% of subjects knew that the annual risk of pregnancy is >10% if no contraception is used. More than 45% of women overestimate the effectiveness of depo-medroxyprogesterone acetate, pills, the patch, the ring, and condoms. After adjustment for age, education, and contraceptive history, the data showed that women who chose the intrauterine device (adjusted relative risk, 6.9; 95% confidence interval, 5.6-8.5) or implant (adjusted relative risk, 5.9; 95% confidence interval, 4.7-7.3) were significantly more likely to identify the effectiveness of their method accurately compared with women who chose either the pill, patch, or ring.
This cohort demonstrated significant knowledge gaps regarding contraceptive effectiveness and over-estimated the effectiveness of pills, the patch, the ring, depo-medroxyprogesterone acetate, and condoms.
本研究旨在确定女性对避孕效果的认知。
我们对 4144 名在接受综合避孕咨询并选择避孕方法之前完成避孕选择项目避孕知识问卷的女性进行了横断面分析。对于每种避孕方法，女性被问到“在一年内怀孕的百分比是多少：<1%、1-5%、6-10%、>10%、不知道。”
总体而言，86%的受试者知道如果不使用避孕措施，每年怀孕的风险>10%。超过 45%的女性高估了 depotmedroxyprogesterone 醋酸酯、药丸、贴片、环和避孕套的有效性。调整年龄、教育和避孕史后，数据显示选择宫内节育器（调整后的相对风险，6.9；95%置信区间，5.6-8.5）或植入物（调整后的相对风险，5.9；95%置信区间，4.7-7.3）的女性比选择药丸、贴片或环的女性更有可能准确识别其方法的有效性。
本队列在避孕效果方面存在显著的知识差距，并高估了药丸、贴片、环、depotmedroxyprogesterone 醋酸酯和避孕套的有效性。
