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| Characteristic | Patients, No. (%) | ||
|---|---|---|---|
| Active-placebo (n = 11) | Placebo-active (n = 12) | Overall (n = 23) | |
| Sex | |||
| Men | 6 (54.5) | 5 (41.7) | 11 (47.8) |
| Women | 5 (45.5) | 7 (58.3) | 12 (52.2) |
| Age, mean (SD), y | 41.7 (12.4) | 33.8 (9.3) | 37.6 (11.4) |
| Hydroxyurea use | 7 (46.7) | 8 (53.3) | 15 (65.2) |
| Race/ethnicity | |||
| Black | 11 (100) | 10 (83.3) | 21 (91.3) |
| Other | 0 | 2 (16.7) | 2 (8.7) |
