Total (N) Female Male P-Value*
HIV-positive 50%   50% 49% 0.81
Mean Age 40 Years   38 years 41 years  
Married 33% 95 34% 32%  
Monogamous (past 6 months) 81% 236 81% 81% 1
Paid Job (past 6 months) 33% 95 32% 33% 0.90
Secondary Education and higher 80% 57 79% 81% 0.66
Sex Work 40% 117 51% 30% 0.0002
Bisexual Behavior 33% 97 39% 28% 0.06
Frequent Alcohol Use (past 6 months) 37% 107 30% 43% 0.02
Crack Cocaine Use (past 6 months) 42% 121 37% 46% 0.12
Injection Drug Use (past 6 months) 29% 84 25% 33% 0.12
Ethnicity         0.43
African American 39% 111 35% 43%  
Caucasian 36% 104 38% 35%  
Hispanic 9% 26 9% 9%  
Asian 1% 3 2% 0%  
Native American 1% 3 1% 1%  
Other 14% 39 14% 13%  
Inconsistent Condom Use (past 6 months) 54% 159 53% 55% 0.72
Physical violence by partner (past 6 months) 29% 82 30% 27%0.60  
Table 1: Baseline characteristics. HIV-Discordant Heterosexual Couples in the San Francisco Bay Area (1996-1999) (n=290).
*p-values based on chi-square test.