STI acquisition factor analysis of demographic and month 0 behavioural risk variables for MSM sub-population with at least one STI at months 0 and/or 6 vs. those without an STI at months 0 and 6.

STI acquisition factor analysis of demographic and month 0 behavioural risk variables for MSM sub-population with at least one STI at months 0 and/or 6 vs. those without an STI at months 0 and 6.针对男男性行为者（MSM，Men who have Sex with Men）亚群，对比在第0个月和/或第6个月至少检出1种性传播感染（STI，Sexually Transmitted Infection）的个体与在第0个月和第6个月均未检出STI的个体，开展其人口统计学特征及第0个月行为风险变量与STI感染风险相关的因素分析。