Table 1.
Baseline Characteristics by Serostatus (Weighted Column Proportions)
| Adv36− | Adv36+ | P Value (Weighted) | |
|---|---|---|---|
| Total | |||
| 500 | 396 (79.2%) | 104 (20.8%) | |
| Baseline age, y | |||
| 18 | 98 (25.0%) | 26 (24.5%) | .77 (.39) |
| 19 | 130 (33.7%) | 33 (31.0%) | |
| 20 | 88 (22.9%) | 21 (21.0%) | |
| 21 | 54 (12.5%) | 19 (19.1%) | |
| 22 | 26 (5.9%) | 5 (4.5%) | |
| Race/ethnicity | |||
| Asian | 18 (4.5%) | 2 (2.3%) | .63 (.53) |
| AA/Black | 49 (11.7%) | 12 (10.7%) | |
| Hispanic | 23 (6.2%) | 7 (6.0%) | |
| American Indian | 1 (0.3%) | 1 (1.0%) | |
| Other | 3 (0.4%) | 2 (2.2%) | |
| White | 289 (73.9%) | 78 (75.6%) | |
| Unknown | 13 (3.0%) | 2 (2.2%) | |
| BMI group, kg/m2 | |||
| 20.0–22.4 | 95 (29.7%) | 30 (34.4%) | .45 (.63) |
| 22.5–24.9 | 98 (31.1%) | 27 (29.7%) | |
| 25.0–27.4 | 98 (28.9%) | 27 (28.6%) | |
| 27.5–30.0 | 105 (10.4%) | 20 (7.3%) | |
| Entry year | |||
| 1995 | 77 (18.2%) | 23 (22.8%) | 0.85 (0.61) |
| 1999 | 78 (20.3%) | 22 (22.0%) | |
| 2001 | 78 (20.1%) | 22 (20.9%) | |
| 2003 | 80 (24.0%) | 20 (21.3%) | |
| 2005 | 83 (17.4%) | 17 (12.9%) |
Abbreviation: AA, African American. Baseline characteristics by serostatus. Counts (of 500) are presented in rows, and in parentheses is the weighted proportion based on the inverse probability each subject's strata was selected (number of eligible recruits in strata divided by 25).