Bivariate regression of demographic factors associated with having sex without a condom with a primary partner +.

+Versus always using a condom during sex in last 4 weeks. Sample includes only those who reported vaginal sex with a primary partner in the last 4 weeks and those who responded to condom use question.1With each increase of a year.2Response is “yes” versus “no”.Bivariate regression of demographic factors associated with having sex without a condom with a primary partner +.+ 以过去4周内性行为全程使用安全套为对照。本研究样本仅纳入过去4周内自述与主要性伴发生阴道性行为，且完成安全套使用相关问题作答的研究对象。1. 每增加1年。2. 应答选项为"是"与"否"。针对与主要性伴发生无安全套性行为相关的人口学因素开展双变量回归分析。