Table 1: Recruitment Rates of the Web-Based HIV Behavioral Surveillance System, 6 U.S. Metropolitan Statistical Areas, 2006-2007

2006 2007
DM (MSAs=4) RDS (MSAs=3) VBS (MSAs=3) DM (MSAs=6) RDS (MSAs=6)
No. (%) No. (%) No. (%) No. (%) No. (%)
Recruitment attempts     34,399     462     6,634     76,294      708
Screeneda 17,774 (52) 172 (37) 2,097 (32) 44,801 (59) 131 (19)
Eligibleb 4,782 (27) 84 (49) 293 (14) 13,785 (31) 105 (80)
Enrolledc 3,338 (70) 75 (89) 265 (90) 10,920 (79) 93 (89)
Completedd 2,528 (76) 71 (95) 239 (90) 7,296 (67) 72 (77)
MSM, past 12 monthse 2,094 (83) 67 (94) 195 (82) 6,015 (82) 63 (88)

MSM = men who have sex with men; DM = direct marketing; RDS = respondent-driven sampling; VBS = venue-based sampling; MSA = metropolitan statistical area

a Screened proportion is among total recruitment attempts.

b Eligible proportion is among total screened.

c Enrolled proportion is among total eligible.

d Completed proportion is among total enrolled.

e Proportion is among total completed. Defined as a man who had sex with at least one man in the past 12 months.