Lee Chi Hyun, Susmann Herbert, Alkema Leontine
Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, USA.
Stud Fam Plann. 2023 Mar;54(1):145-160. doi: 10.1111/sifp.12225. Epub 2023 Feb 24.
Family planning measures for unmarried women are based on contraceptive demand and use among sexually active women. Sexual activity status is commonly defined based on comparing reported time-since-last-sex to a cutoff time, with women defined to be sexually active if their most recent sex was within the last four weeks. While easy to understand and compute, this approach to constructing family planning measures results in a limited understanding of family planning and exposure to unintended pregnancy because it cannot comprehensively capture the frequency of sex at the population level. We propose a new statistical approach to quantify sexual activity, using reported time-since-last-sex data. Based on estimated frequencies of sex among users and nonusers in need of family planning, we propose new family planning measures, including the ratio of protected exposure over all women's exposure to risk of unintended pregnancy.
针对未婚女性的计划生育措施基于性活跃女性的避孕需求和使用情况。性活动状况通常是通过将报告的末次性行为时间与截止时间进行比较来定义的，如果女性最近一次性行为发生在过去四周内，则被定义为性活跃。虽然这种方法易于理解和计算，但构建计划生育措施的这种方式导致对计划生育的理解有限，且易面临意外怀孕风险，因为它无法在人群层面全面捕捉性行为的频率。我们提出一种新的统计方法，利用报告的末次性行为时间数据来量化性活动。基于计划生育使用者和有需求的非使用者的估计性行为频率，我们提出新的计划生育措施，包括受保护暴露与所有女性意外怀孕风险暴露的比率。
