TABLE 1.
Network Index and Prevalence of Newly Identified HIV Infections Among Network Associates in 7 US Cities, by Recruiter Characteristics: Social Networks Demonstration Project, October 2003–December 2005
| Recruiter Characteristic | Recruiters, No. (%) | Network Indexa | Pb | HIV Prevalence,c % (95% CI) | Pd |
| HIV serostatus | <.01 | <.01 | |||
| Positive | 255 (60) | 6.2 | 6.8 (5.6, 8.2) | ||
| Negative | 167 (40) | 9.4 | 4.4 (3.4, 5.5) | ||
| Gender | .63 | .26 | |||
| Men | 265 (63) | 8.4 | 5.8 (4.9, 6.9) | ||
| Women | 128 (30) | 6.1 | 4.7 (3.4, 6.5) | ||
| Transgender | 29 (7) | 4.8 | 7.9 (4.0, 13.7) | ||
| Age, y | .02 | .34 | |||
| 18–24 | 24 (6) | 7.0 | 3.0 (1.0, 6.8) | ||
| 25–34 | 50 (12) | 16.9 | 5.2 (3.8, 6.9) | ||
| 35–44 | 180 (42) | 6.4 | 6.3 (5.0, 7.9) | ||
| ≥ 45 | 168 (40) | 5.8 | 5.7 (4.4, 7.4) | ||
| Race/ethnicity | .02 | .14 | |||
| African American | 257 (61) | 6.1 | 6.4 (5.2, 7.7) | ||
| Hispanic | 99 (23) | 13.1 | 5.2 (4.0, 6.5) | ||
| White | 50 (12) | 3.5 | 3.4 (1.3, 7.3) | ||
| Othere | 16 (4) | 6.4 | 2.9 (0.6, 8.4) | ||
| Risk group | <.01 | <.01 | |||
| High-risk heterosexual | 193 (46) | 7.5 | 5.0 (3.9, 6.2) | ||
| IDU | 55 (13) | 7.7 | 6.3 (4.2, 9.1) | ||
| MSM | 92 (22) | 5.8 | 8.7 (6.4, 11.3) | ||
| MSM and IDU | 58 (14) | 11.6 | 4.0 (2.7, 5.8) | ||
| Risk not specified | 24 (5) | 2.9 | 7.2 (2.4, 15.9) | ||
| All recruiters | 422 (100) | 7.4 | 5.6 (4.8, 6.5) |
Note. CI = confidence interval; MSM = men who have sex with men; IDU = injection drug user. Twenty-six network associates (persons recruited from social networks of recruiters) could not be linked to a specific recruiter. There were no newly identified HIV infections among these 26 network associates.
The index is the number of network associates tested divided by number of recruiters.
Calculated from the Kruskal–Wallis nonparametric χ2 test for associations between recruiter characteristics and number of network associates tested. Recruiters whose race or risk were not specified were not included in the statistical tests.
This is the prevalence of newly identified HIV infections among network associates (number of network associates with newly identified HIV infection divided by number of network associates tested).
Calculated from the Pearson χ2 test for associations between recruiter characteristics and number of new HIV-positive network associates identified.
Included American Indian/Alaska Native, 8 (2%); Asian, 2 (0.4%); Native Hawaiian/Pacific Islander, 2 (0.5%); and multiple/unknown race, 4 (1%).