TABLE 2.
Demographic determinants of TRT blood donors and their matched controls at 16 USA blood centers. Data were collected over a 2-year period (2017–2018) and represent count and distribution of donor age, sex, race/ethnicity, and donation frequency stratified by TRT status. Full TRT cohort represents blood donors who received TRT at least one time during the study period. Consistent TRT donors represent blood donors who were registered as TRT at all visits during the study period
| Full TRT cohort | Consistent TRT donors | Matched controls | ||||
|---|---|---|---|---|---|---|
| Variable | n | % | n | % | n | % |
| Total donors | 12,838 | 100.0 | 5498 | 100.0 | 27,298 | 100.0 |
| Age | ||||||
| 15–19 | 31 | 0.2 | 18 | 0.3 | 90 | 0.3 |
| 20–29 | 310 | 2.4 | 148 | 2.7 | 740 | 2.7 |
| 30–39 | 1847 | 14.4 | 878 | 16.0 | 4379 | 16.0 |
| 40–49 | 3853 | 30.0 | 1752 | 31.9 | 8614 | 31.6 |
| 50–59 | 3759 | 29.3 | 1582 | 28.8 | 7880 | 28.9 |
| 60–69 | 2232 | 17.4 | 845 | 15.4 | 4221 | 15.5 |
| 70–93 | 806 | 6.3 | 275 | 5.0 | 1374 | 5.0 |
| Sex | ||||||
| Male | 12,495 | 97.3 | 5331 | 97.0 | 26,463 | 97.0 |
| Female | 343 | 2.7 | 167 | 3.0 | 835 | 3.0 |
| Race/ethnicity | ||||||
| White | 10,255 | 79.9 | 4446 | 80.9 | 22,079 | 80.9 |
| Black | 227 | 1.8 | 113 | 2.1 | 565 | 2.1 |
| Hispanic | 1318 | 10.3 | 581 | 10.6 | 2888 | 10.6 |
| Asian | 181 | 1.4 | 71 | 1.3 | 355 | 1.3 |
| Native American | 38 | 0.3 | 22 | 0.4 | 104 | 0.4 |
| Other | 318 | 2.5 | 134 | 2.4 | 664 | 2.4 |
| Missing | 501 | 3.9 | 131 | 2.4 | 643 | 2.4 |
| Number of donations during 2-year study period | ||||||
| 1 | 5689 | 44.3 | 2816 | 51.2 | 14,080 | 51.6 |
| 2–5 | 5146 | 40.1 | 1981 | 36.0 | 9893 | 36.3 |
| 6–9 | 1433 | 11.2 | 508 | 9.2 | 2528 | 9.3 |
| 10–13 | 425 | 3.3 | 154 | 2.8 | 797 | 2.9 |
| 14–37 | 145 | 1.1 | 39 | 0.7 | 0 | 0.0 |