Demographic characteristics of study participants
| Characteristic . | Screened (n = 983) . | Randomized (n = 79) . | Iron (n = 39) . | Placebo (n = 40) . |
|---|---|---|---|---|
| Age, y (IQR) | 35 (27-53) | 34 (26-47) | 33 (26-47) | 34 (26-49) |
| Female sex, n (%) | 623 (63.4) | 54 (68.4) | 27 (69.2) | 27 (67.5) |
| Race,∗ n (%) | ||||
| White | 742 (75.5) | 56 (70.9) | 25 (64.1) | 31 (77.5) |
| Black | 71 (7.2) | 2 (2.5) | 1 (2.6) | 1 (2.5) |
| Asian | 88 (9.0) | 10 (12.7) | 6 (15.4) | 4 (10.0) |
| Other | 82 (8.3) | 11 (13.9) | 7 (17.9) | 4 (10.0) |
| Hispanic, n (%)∗ | 98 (10.0) | 9 (11.4) | 6 (15.4) | 3 (7.5) |
| Weight, kg (IQR)∗ | 71 (61-82) | 68 (60-82) | 73 (64-79) | 66 (59-82) |
| Prior donations in 1 y, n (IQR) | 2 (1-3) | 2 (2-3) | 2 (2-3) | 2 (1-4) |
| Characteristic . | Screened (n = 983) . | Randomized (n = 79) . | Iron (n = 39) . | Placebo (n = 40) . |
|---|---|---|---|---|
| Age, y (IQR) | 35 (27-53) | 34 (26-47) | 33 (26-47) | 34 (26-49) |
| Female sex, n (%) | 623 (63.4) | 54 (68.4) | 27 (69.2) | 27 (67.5) |
| Race,∗ n (%) | ||||
| White | 742 (75.5) | 56 (70.9) | 25 (64.1) | 31 (77.5) |
| Black | 71 (7.2) | 2 (2.5) | 1 (2.6) | 1 (2.5) |
| Asian | 88 (9.0) | 10 (12.7) | 6 (15.4) | 4 (10.0) |
| Other | 82 (8.3) | 11 (13.9) | 7 (17.9) | 4 (10.0) |
| Hispanic, n (%)∗ | 98 (10.0) | 9 (11.4) | 6 (15.4) | 3 (7.5) |
| Weight, kg (IQR)∗ | 71 (61-82) | 68 (60-82) | 73 (64-79) | 66 (59-82) |
| Prior donations in 1 y, n (IQR) | 2 (1-3) | 2 (2-3) | 2 (2-3) | 2 (1-4) |
Self-reported by subjects.