Direct-Entry Midwifery Program, School of Arts, Sciences and Humanities of the University of São Paulo, São Paulo, Brazil.
Department of Population, Family, and Reproductive Health, Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, MD, United States; Sexual and Reproductive Health, CESP Centre for Research in Epidemiology and Population Health, U1018, Inserm, Villejuif, France.
Sex Reprod Healthc. 2019 Oct;21:81-86. doi: 10.1016/j.srhc.2019.06.008. Epub 2019 Jun 27.
This paper examines the factors related to emergency contraception (EC) use in the context of contraceptive discontinuation among undergraduate women in Brazil.
This a retrospective cohort study conducted among a probability sample of 1679 undergraduate women in Sao Paulo, Brazil. Data were collected online using a contraceptive calendar. We examined factors related to EC use following contraceptive discontinuation for method-related reasons and contraceptive abandonment. We also analyzed factors related to EC use following inconsistent use of contraception. Analyses were conducted using Pearson's Chi-square tests and logistic regression.
More than half (54.6%) of young women reported lifetime EC use and 16.5% had used EC in the 12-months prior to the survey. Last use of EC was mostly related to inconsistent or incorrect use of regular contraception (90.6%). Three quarters of women (76.2%) who discontinued contraception and were at risk of becoming pregnant did not use EC following discontinuation, and only 10.5% used EC after stopping contraception altogether. Women who were younger, who self-identified as Evangelicals, who reported more than four lifetime sexual partners, and who had no pregnancy history had higher odds of using EC following discontinuation for method-related reasons.
We conclude that most undergraduate students in São Paulo Brazil do not use EC when needed, such as contraceptive discontinuation, potentially reflecting a lack of pregnancy risk recognition.
本文考察了巴西大学生群体中，与因避孕方法相关而停止使用避孕方法及主动放弃避孕时，紧急避孕（EC）使用相关的因素。
这是一项在巴西圣保罗的概率抽样中，对 1679 名大学生进行的回顾性队列研究。使用避孕日历在线收集数据。我们考察了与因避孕方法相关而停止使用避孕方法及主动放弃避孕时，EC 使用相关的因素。我们还分析了与因避孕方法使用不规律而导致 EC 使用相关的因素。分析采用 Pearson's Chi-square 检验和逻辑回归。
超过一半（54.6%）的年轻女性报告有过 EC 使用史，16.5%的女性在调查前 12 个月内使用过 EC。最近一次 EC 使用主要与常规避孕方法使用不规律或不正确有关（90.6%）。四分之三（76.2%）因避孕方法相关而停止避孕且有怀孕风险的女性在停止避孕后没有使用 EC，只有 10.5%的女性在完全停止避孕后使用了 EC。年龄较小、自认为是福音派信徒、报告有超过四个性伴侣、没有怀孕史的女性，因避孕方法相关而停止使用避孕方法后使用 EC 的可能性更高。
我们的结论是，巴西圣保罗的大多数大学生在需要时（例如停止避孕时）并不使用 EC，这可能反映了对怀孕风险的认识不足。
