Department of Obstetrics and Gynecology, Division of Clinical Research, Washington University School of Medicine, St. Louis, MO 63110, USA.
Contraception. 2011 May;83(5):479-85. doi: 10.1016/j.contraception.2010.10.001. Epub 2010 Nov 23.
We compared contraceptive prevalence reported in the Contraceptive CHOICE Project (CHOICE) at time of enrollment with estimates from representative surveys, the 2006-2008 National Survey of Family Growth (NSFG) and 2006 Missouri Behavioral Risk Factor Surveillance System (BRFSS).
We calculated survey weights for CHOICE participants and compared selected demographic characteristics and prevalence estimates of current contraceptive methods being used at the time of enrollment.
Compared with the NSFG, CHOICE participants at the time of enrollment were less likely to be contraceptive pill users (16.1% vs. 24.0%) and more likely to use condoms (23.8% vs. 13.8%). Compared with the BRFSS, CHOICE participants were more likely to use condoms (20.4% vs. 12.9%) and withdrawal (6.6% vs. 0.4%).
Despite differences in sampling strategies between CHOICE and state and national surveys, the contraceptive prevalence estimates were largely similar. This information combined with the high rates of long-acting reversible contraception (LARC) use after enrollment by CHOICE particiants that have been previously reported by study participants may imply that cost and restricted access to LARC could be essential factors in the low rates of LARC use in the United States.
我们将参与避孕选择项目(CHOICE)的参与者在登记时报告的避孕普及率与代表性调查,即 2006-2008 年全国家庭增长调查(NSFG)和 2006 年密苏里州行为危险因素监测系统(BRFSS)的估计值进行了比较。
我们为 CHOICE 参与者计算了调查权重,并比较了在登记时使用的当前避孕方法的选择人口统计学特征和流行率估计值。
与 NSFG 相比,登记时的 CHOICE 参与者中避孕药使用者的比例较低(16.1%对 24.0%),而使用避孕套的比例较高(23.8%对 13.8%)。与 BRFSS 相比,CHOICE 参与者更有可能使用避孕套(20.4%对 12.9%)和体外排精(6.6%对 0.4%)。
尽管 CHOICE 和州及国家调查的抽样策略存在差异,但避孕普及率估计值大致相似。这些信息,加上此前研究参与者报告的 CHOICE 参与者在登记后长效可逆避孕(LARC)使用率较高,可能意味着成本和对 LARC 的限制获取可能是美国 LARC 使用率低的重要因素。