Research Article

Event-Specific Risk Factors Predicting Episodes of Unprotected Anal Intercourse with Male Nonregular Partners among Men Who Have Sex with Men Using Case-Crossover Study Design

Table 1

Background characteristics of participants.

AllRecruited from gay venuesRecruited from internet value#
% % %

Sociodemographic  characteristics
Age (years)
 ≤3053.049.760.9
 31–4034.434.434.4
 41–509.311.34.7
 ≥513.24.60.00.105
Education level
 Junior high or lower7.47.96.3
 Senior high29.831.126.6
 College and above62.860.967.20.681
Current marital status
 Single87.486.092.2
 Cohabiting with a man7.98.07.8
 Cohabiting with or married to a woman3.85.30.0
 Divorced/widowed/others1.00.70.00.257
Sexual orientation
 Homosexual87.487.487.5
 Bisexual10.79.912.5
 Heterosexual/uncertain1.92.60.00.373
Mode of recruitment
 Bar or disco30.2
 Sauna35.8
 Internet29.8
 Beach4.2

By chi-square test.