Powell M G, Mears B J, Deber R B, Ferguson D
Contraception. 1986 Mar;33(3):215-32. doi: 10.1016/0010-7824(86)90015-6.
With the growing interest in barrier contraceptive methods, the cervical cap has come back into use in North America. We examined the cap's effectiveness, safety, continuity of use, and user satisfaction among 617 women who were fitted at a family planning clinic in Toronto, Canada, between May 1981 and November 1983. Follow-up information was available for 516 of these women. Using a life table analysis with Bayesian adjustment, the probability of becoming pregnant after 12 months of use was 0.166 with a standard error of 0.022. There is evidence that after 1 year of use the caps deteriorate and that this deterioration may increase the risk of pregnancy. Many of the women in this study were very satisfied with the cervical cap; however, such problems as dislodgement, discomfort to user and partner, difficulty with insertion and removal, and unpleasant odour affected acceptability and continuity of use. It is likely that these problems could be alleviated by improving the quality of or changing the materials, modifying the design to improve the fit, and providing a greater range of sizes.
随着人们对屏障避孕方法的兴趣日益浓厚，宫颈帽在北美再度开始使用。我们对1981年5月至1983年11月期间在加拿大多伦多一家计划生育诊所佩戴宫颈帽的617名女性，研究了该避孕工具的有效性、安全性、使用持续性以及用户满意度。其中516名女性有随访信息。采用贝叶斯调整的生命表分析，使用12个月后怀孕的概率为0.166，标准误差为0.022。有证据表明，使用1年后宫颈帽会出现损坏，而这种损坏可能会增加怀孕风险。本研究中的许多女性对宫颈帽非常满意；然而，诸如移位、使用者及伴侣感到不适、插入和取出困难以及气味难闻等问题影响了其可接受性和使用持续性。通过提高质量或更换材料、改进设计以提高贴合度以及提供更多尺寸选择，这些问题有可能得到缓解。
