Chofakian Christiane Borges do Nascimento, Moreau Caroline, Borges Ana Luiza Vilela, Santos Osmara Alves Dos
a Direct-Entry Midwifery Program, School of Arts, Sciences and Humanities, University of São Paulo , São Paulo , Brazil.
b Department of Population, Family, and Reproductive Health , Bloomberg School of Public Health, Johns Hopkins University , Baltimore , MD , USA.
Eur J Contracept Reprod Health Care. 2018 Oct;23(5):335-343. doi: 10.1080/13625187.2018.1526897. Epub 2018 Oct 24.
The aim of our study was to describe contraceptive patterns 30 days after use of emergency contraception (EC) among female undergraduate students in São Paulo, Brazil.
This study was part of a larger project conducted in 2015 among 1679 female students aged 18-24 enrolled at the University of São Paulo. Analysis was restricted to the 916 students who reported lifetime use of EC. Logistic regression models were used to examine factors related to the use of contraception within the 30 day period following the last use of EC, changes in contraceptive behaviour before and after EC use, and gaps in contraceptive use within 30 days after EC use.
Most women (75.4%) used contraception after accessing EC; 92.9% who used contraception prior to EC exposure resumed use of contraception afterwards, compared with 40.7% who did not use contraception prior to EC exposure. Only 6.3% of women switched to a less effective contraceptive method after EC use. Few women (7.5%) reported post-EC gaps in contraception.
The results of this study suggest that EC may serve as a potential precursor to regular contraception among undergraduates in Brazil, with few women reporting contraceptive gaps after EC use. These patterns may contribute to reducing the risk of unintended pregnancy in this population.
我们研究的目的是描述巴西圣保罗女大学生使用紧急避孕措施（EC）30天后的避孕模式。
本研究是2015年对圣保罗大学1679名年龄在18 - 24岁的女学生开展的一个更大项目的一部分。分析仅限于报告曾使用过紧急避孕措施的916名学生。采用逻辑回归模型来研究与最后一次使用紧急避孕措施后30天内使用避孕方法相关的因素、紧急避孕措施使用前后避孕行为的变化以及紧急避孕措施使用后30天内避孕使用的差距。
大多数女性（75.4%）在使用紧急避孕措施后采取了避孕措施；在接触紧急避孕措施之前使用避孕方法的女性中，92.9%在之后恢复使用避孕方法，而在接触紧急避孕措施之前未使用避孕方法的女性中这一比例为40.7%。只有6.3%的女性在使用紧急避孕措施后改用了效果较差的避孕方法。很少有女性（7.5%）报告在使用紧急避孕措施后出现避孕间隔。
本研究结果表明，紧急避孕措施可能是巴西大学生常规避孕的一个潜在先兆，很少有女性报告在使用紧急避孕措施后出现避孕间隔。这些模式可能有助于降低该人群意外怀孕的风险。
