Table 1.
| Cases | External controls | Resistant women | |
|---|---|---|---|
| n=162 | n=470 | n=86 | |
| Age | 28 (24 – 33) | 30 (25 – 35)* | 33 (29 – 38)* |
| Years in sex work prior to enrollment | 1 (0.25 – 3) | 1 (0.1 – 4) | 2 (0.5 – 7) |
| Years in sex work after enrollment (censored at infection) | 1.0 (0.4 – 2.2) | 4.8 (2.2 – 8.2)* | 13.4 (11.2 – 15.6)* |
| Calendar year of sample collection | 1997 (1995 – 2001) | 2000 (1996 – 2005) | 1997 (1995 – 2002) |
| Hormonal contraception in past 70 days, no. (%) | |||
| Oral contraceptive pill | 28 (17%) | 54 (12%) | 0 (0%)* |
| Depot medroxyprogesterone acetate | 51 (32%) | 92 (13%)* | 11 (13%)* |
| Norplant | 3 (2%) | 10 (2%) | 1 (1%) |
| Intrauterine device | 4 (2.5%) | 9 (2%) | 2 (4%) |
| Sexual risk behavior in past week | |||
| Sex frequency | 1 (0 – 2) | 1 (0 – 2) | 1 (0 – 2) |
| Number sexual partners | 1 (0 – 1) | 1 (0 – 1) | 1 (0 – 1) |
| Any unprotected sex, no. (%) | 43 (28%) | 107 (23%) | 31 (36%) |
| Sexual risk behavior averaged over time in cohort | |||
| Average unprotected sex acts per week | 0.08 (0 – 0.6) | 0.09 (0 – 0.7) | 0.1 (0 – 0.7) |
| STI in past 70 days, no. (%) | |||
| Bacterial vaginosis | 85 (52%) | 228 (49%) | 40 (47%) |
| Trichomoniasis | 13 (8%) | 31 (7%) | 9 (11%) |
| Cervicitis | 35 (22%) | 72 (9%) | 12 (14%) |
| Gonorrhea | 16 (10%) | 21 (4%)* | 2 (2%) |
| Genital ulcer disease | 8 (5%) | 10 (2%) | 5 (6%) |
| Any | 113 (70%) | 271 (58%)* | 48 (57%)* |
Values shown are median (IQR) except as noted.
*
Significantly different than cases, p<0.05