Table 3: Characteristics and Behaviors of MSM Participants in the National HIV Behavioral Surveillance System (2003-2005) and the Web-Based HIV Behavioral Surveillance System (2007)

NHBS (n=2607) WHBS (n=2617) Wald Chi-Square p-Valuea
No. (%) No. (%)
Race/Ethnicity p<0.0001
 White, not Hispanic 1254 (48) 1685 (64)
 Black, not Hispanic 435 (17) 215 (8)
 Hispanic 539 (21) 461 (18)
 Asian or Pacific Islander 190 (7) 100 (4)
 Multiracial or other race/ethnicity 189 (7) 156 (6)
Age p<0.0001
 18-20 104 (4) 466 (18)
 21-30 818 (31) 1147 (44)
 31-40 951 (36) 511 (20)
 > 40 734 (28) 493 (19)
College Education 2024 (78) 2185 (83) p<0.0001
Sexual Identity p=0.87
 Homosexual 2180 (84) 2181 (83)
 Bisexual 400 (15) 413 (16)
 Heterosexual 27 (1) 23 (1)
HIV Serostatusb p<0.0001
 Positive 361 (14) 230 (9)
 Negative 1969 (76) 1843 (70)
 Untested/Unknown 277 (11) 544 (21)
Engaged in unprotected anal sex with most recent casual male sex partner 497 (19) 766 (29) p<0.0001
Met most recent casual male sex partner on the internet 422 (16) 1599 (61) p<0.0001
Under influence of drugs during sex with most recent casual male sex partner 414 (16) 304 (12) p=0.01
Unknown serostatus of most recent casual male sex partner 1630 (63) 1067 (41) p<0.0001

MSM = men who have sex with men. NHBS = National HIV Behavioral Surveillance System. WHBS = Web-based HIV Behavioral Surveillance System.
a Wald Chi-square p-value from multivariate logistic regression model; model also included metropolitan statistical area of residence (data not shown).
b Self-reported results of last HIV test; untested/unknown includes those never HIV tested or did not know the results of their last test.