Demographic characteristics of the full study population
| Demographic characteristics . | Controls (n = 60) . | SCD (n = 149) . |
|---|---|---|
| Age, median (IQR), y | 13 (11-16) | 13.6 (9.3-17.1) |
| Sex, female, n (%) | 31 (51.7) | 79 (53.0) |
| Number of hospitalizations for pain in previous 3 years, median (IQR) | N/A | 3 (1-6) |
| Hydroxyurea use, n (%) | N/A | 91 (61.1) |
| Demographic characteristics . | Controls (n = 60) . | SCD (n = 149) . |
|---|---|---|
| Age, median (IQR), y | 13 (11-16) | 13.6 (9.3-17.1) |
| Sex, female, n (%) | 31 (51.7) | 79 (53.0) |
| Number of hospitalizations for pain in previous 3 years, median (IQR) | N/A | 3 (1-6) |
| Hydroxyurea use, n (%) | N/A | 91 (61.1) |
IQR, interquartile range; N/A, not applicable.