Table 2. Baseline risk factors for HIV infection comparing clinical and community control samples.
| Item | Clinical N = 260 % (n) or mean (SD) |
Community Controls N = 201 % (n) or mean (SD) |
Statistic | p value |
|---|---|---|---|---|
| Lifetime history of IDU | 7.5 (19) (n=255) |
1.0 (2) (n=199) |
χ12=10.53 | 0.001 |
| Proportion of friends having sex (all and most) | 88.7 (227) (n=256) |
28.0 (54) (n=193) |
χ12=173.10 | 0.0005 |
| People my age are just too young to have sex (strongly disagree and disagree) | 82.0 (210) (n=256) |
44.9 (89) (n=198) |
χ12=68.28 | 0.0005 |
| It's better not to have sex rather than to risk getting pregnant or a disease (strongly disagree and disagree) | 47.1 (120) (n=255) |
22.3 (44) (n=197) |
χ12=29.39 | 0.0005 |
| When people your age have sex, do they usually use some kind of protection (almost none and some) | 33.5 (85) (n=254) |
14.5 (28) (n=193) |
χ12=20.86 | 0.0005 |
| How much peer pressure is there on people your age to have sex (a lot and a fair amount) | 50.4 (129) (n=256) |
50.8 (100) (n=197) |
χ12=0.01 | 0.938 |
| Unprotected sex (any response other than almost always uses protection or no sex) | 49.6 (128) (n=258) |
10.6 (21) (n=198) |
χ12=77.48 | 0.0005 |
| Ever had sex | 92.7 (240) (n=259) |
33.8 (67) (n=198) |
χ12=176.11 | 0.0005 |
| Onset age of sex (years) | 13.1 (1.6) (n=239) |
14.6 (1.6) (n=67) |
U=4103.50 | 0.0005 |
| Number of lifetime sex partners | 6.2 (5.5) (n=256) |
1.3 (3.0) (n=196) |
U=6798.00 | 0.0005 |
Note: Some participants failed to answer all questions; n = the number of participants who responded to the question.