| Characteristic (N = 300) | Category | N (%) |
| Age | Mean age (SD) | 27.7 (6.4) |
| Median age (IQR) | 26.5 (21 - 32) | |
| School years | Mean number of years (SD) | 8.8 (3.1) |
| Ethnicity | Luo | 283 (94.3%) |
| Other | 17 (5.7%) | |
| Monthly income | Income ≤ 115 US$ (10,000 KShs) | 273 (91.0%) |
| Income > 115 US$ (10,000 KShs) | 27 (9.0%) | |
| Religion | Mainline Protestant | 75 (25.0%) |
| Catholic | 46 (15.3%) | |
| Independent African churches | 131 (43.7%) | |
| Other | 48 (16.0%) | |
| Duration of vocational training | Less than 1 year | 22 (32.4%) |
| 1 - 2 years | 33 (48.5%) | |
| More than 2 years | 13 (19.1%) | |
| Sexual History: | ||
| Age of sexual debut | Mean age (SD) | 13.5 (3.7) |
| Median age (IQR) | 13 (5) | |
| Condom use at sexual debut | Yes | 20 (6.7%) |
| No | 280 (93.3%) | |
| History of HIV test: | Ever tested for HIV | 243 (81.3%) |
| Immunologic parameters, N = 287; (mean, SD): | Baseline CD4 (HIV Positive) | 518.9 (297.31) cells/µl |
| Baseline CD4 (HIV Negative) | 922.7 (304.32) cells/µl | |
| Baseline CD4 (overall) | 829.8 (346.82) cells/µl | |
| White blood cells (×109/L) | 5.6 (1.53) |