Table 1.
Subjects (n = 2,249) (Baselinea characteristics) Number (%)b |
Person-years (n = 19,250) |
|
---|---|---|
Age (years) | 32.8 (28.5/37.9)c | |
Education | ||
Less then college degree | 1046 (46.5) | |
College degree or higher | 1178 (52.4) | |
Use of amphetamines in the past six months | ||
None | 1576 (70.1) | 16050 (83.4) |
Monthly or less frequent | 527 (23.4) | 2036 (10.6) |
Weekly or more frequent | 85 (3.8) | 404 (2.1) |
Use of marijuana in the past six months | ||
None | 573 (25.5) | 8806 (45.7) |
Monthly or less frequent | 934 (41.5) | 5708 (29.7) |
Weekly or more frequent | 735 (32.7) | 4495 (23.4) |
Use of cocaine in the past six months | ||
None | 1297 (57.7) | 14859 (77.2) |
Monthly or less frequent | 863 (38.4) | 3591 (18.7) |
Weekly or more frequent | 83 (3.7) | 565 (2.9) |
Use of amyl nitrites in the past six months | ||
None | 626 (27.8) | 10956 (56.9) |
Monthly or less frequent | 969 (43.1) | 5217 (27.1) |
Weekly or more frequent | 85 (3.8) | 2828 (14.7) |
Tobacco Smoking in the past six months | ||
No | 1327 (59.0) | 12621 (65.6) |
<1 pack per day | 338 (15.0) | 2615 (13.6) |
≥1 pack per day | 575 (25.6) | 3972 (20.6) |
Alcohol drinking in the past six months | ||
No | 176 (7.8) | 1637 (8.5) |
≤2 times/week | 1157 (51.4) | 10157 (52.8) |
>2 times/week | 900 (40.0) | 6030 (31.3) |
Number of male sexual partners in the past six months | ||
<6 | 1106 (49.2) | 14214 (73.8) |
≥6 | 1140 (50.7) | 4660 (24.2) |
Receptive anal sex (RA) in the past six months | ||
No | 341 (15.2) | 8691 (45.1) |
RA with use of condoms at all times | 235 (10.4) | 4409 (22.9) |
RA with inconsistent or no use of condom | 1647 (73.2) | 5672 (29.5) |
Baseline CD4 lymphocyte count (/μl) | 578 (422/770)c |
Baseline defined as the first HIV seropositive study visit
Percent may not add up to 100% due to missing values
Median (25/75 percentile)