Table 1.
Description of Study Population and Initial Resistance Test
| N (%) or Median (IQR) | |
|---|---|
| No. of patients | 313 |
| Gender | |
| Male | 220 (70) |
| Female | 22 (7) |
| Unknown | 71 (23) |
| Exposure source | |
| Homo/bisexual | 187 (60) |
| Heterosexual | 24 (8) |
| Other (including 1 injecting drug user) | 13 (4) |
| Unknown | 89 (28) |
| CD4 at first test (cells/mm3)a | 427 (268, 545) |
| Viral load at first test (log10 copies/mL)b | 4.6 (4.0, 5.1) |
| Subtype | |
| B | 248 (79) |
| Non-B | 42 (13) |
| Not classified | 23 (7) |
| First test within 18 mo of infectionc | |
| No or unknown | 266 (85) |
| Yes | 47 (15) |
| No. of mutations in first test | |
| 1 | 185 (59) |
| 2 | 59 (19) |
| 3 | 23 (7) |
| ≥4 | 46 (15) |
| No. of patients with | |
| ≥1 NRTI mutation | 204 (65) |
| ≥1 NNRTI mutation | 120 (38) |
| ≥1 PI mutation | 74 (24) |
| No. of patients with resistance to | |
| 1 class | 212 (68) |
| 2 classes | 83 (27) |
| 3 classes | 18 (6) |
Abbreviations: HIV, human immunodeficiency virus; IQR, interquartile range.
a Within 90 days before/after resistance test, N = 217.
b Within 90 days before/after resistance test, N = 238.
c First resistance test within 18 months of HIV-negative test in patients with ≤18 months between HIV-negative and HIV-positive tests.