Table 2.
Demographic characteristics of the MACS sample, individuals with set point viral load data and seroconversion role data available.
| Categorical Variables | Category | n | % |
|---|---|---|---|
| Age at Seroconversion | < 30 | 106 | 28.3 |
| 30–39.9 | 174 | 46.5 | |
| 40–49.9 | 73 | 19.5 | |
| ≥50 | 21 | 5.6 | |
| Cohort (enrollment years) | 1984 (1984–1985) | 344 | 92.0 |
| 1987 (1987–1991) | 11 | 2.9 | |
| 2001 (2002–2003) | 19 | 5.1 | |
| Race/ethnicity | Black, non-Hispanic | 32 | 8.6 |
| Hispanic | 25 | 6.7 | |
| Asian or Pacific Islander | 2 | 0.5 | |
| White, non-Hispanic | 315 | 84.2 | |
| City | Baltimore | 101 | 27.0 |
| Chicago | 87 | 23.3 | |
| Los Angeles | 105 | 28.0 | |
| Pittsburgh | 81 | 21.7 |
| Continuous Variables | Measurement Time | n | Mean | Median | IQR | |
|---|---|---|---|---|---|---|
| Est. age at seroconversion | Seroconversion interval midpoint | 374 | 35.3 | 34.0 | 29.4 | 40.1 |
| Plasma log10 viral load | Visit 1 | 334 | 4.30 | 4.49 | 3.95 | 4.83 |
| Visit 2 | 304 | 4.28 | 4.40 | 3.90 | 4.76 | |
| 2-visit mean | 264 | 4.31 | 4.47 | 3.94 | 4.75 | |
| Overall | 374 | 4.29 | 4.45 | 3.92 | 4.76 |