BACKGROUND In Brazil, high contraceptive prevalence rates coexist with high rates of unintended pregnancies. Contraceptive discontinuation may explain this context, but few studies have focused on highly educated young women in countries with low unmet need for modern contraception. This paper explores frequency and associated factors of contraceptive discontinuation among undergraduate students in Brazil within 12-months. METHODS This retrospective cohort study was conducted among a probability sample of 1679 undergraduates of São Paulo University. Data were collected online using a contraceptive calendar. We examined factors related to monthly discontinuation of oral pills and male condoms using Generalized Estimating Equation models. RESULTS Altogether, 19% of oral pill users and 48% of male condom users discontinued their method for method-related reasons within 12-months, and 18% of oral pill users and 15% of male condom users abandoned/or switched to less effective methods. Women in casual relationships were at increased odds of oral pill (OR = 1.4 [1.1-1.8]) and male condom discontinuation (OR = 1.3 [1.0-1.7]), and at increased odds of switching from oral pill to less effective or no method (OR = 1.4 [1.1-1.7]). Other associated factors were method specific. Women from lower socioeconomic status or who had multiple lifetime partners were more likely to discontinue or abandon the oral pill, while more sexually experienced women were less likely to discontinue the male condom. CONCLUSION Frequent method discontinuation in Brazil calls for greater attention to the difficulties women face when using short acting methods. Discontinuation was associated with type of partner and sexual experience highlighting the changing contraceptive needs of women at the early stages of their professional careers.

中文翻译：

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停止避孕：巴西本科女性的频率和相关因素。


背景 在巴西，高避孕普及率与高意外怀孕率并存。停止避孕或许可以解释这种情况，但很少有研究关注现代避孕需求未满足率较低的国家中受过高等教育的年轻女性。本文探讨了巴西本科生 12 个月内停止避孕的频率和相关因素。方法 这项回顾性队列研究是在圣保罗大学 1679 名本科生的概率样本中进行的。使用避孕日历在线收集数据。我们使用广义估计方程模型研究了与每月停用口服药和男用避孕套相关的因素。结果 总共，19% 的口服药使用者和 48% 的男性安全套使用者在 12 个月内因与方法相关的原因停止使用该方法，18% 的口服药使用者和 15% 的男性安全套使用者放弃/或改用效果较差的方法方法。处于随意关系中的女性服用口服避孕药（OR = 1.4 [1.1-1.8]）和停用男性安全套（OR = 1.3 [1.0-1.7]）的几率增加，并且从口服避孕药改用效果较差或无效的几率也增加方法（OR = 1.4 [1.1-1.7]）。其他相关因素因方法而异。社会经济地位较低或有多个终生伴侣的女性更有可能停止或放弃口服避孕药，而性经验丰富的女性则不太可能停止使用男用避孕套。结论 在巴西，方法频繁中断，需要更多地关注女性在使用短效方法时面临的困难。 停药与伴侣类型和性经历有关，突显了女性在职业生涯早期阶段不断变化的避孕需求。