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Demographics and haemophilia-related characteristics.
| Race/ethnicity (N, %) | |
| White | 195 (73.6 %) |
| Hispanic | 42 (15.9 %) |
| Black | 24 (9.1 %) |
| Other | 4 (1.5 %) |
| Severity (N, %) | |
| Mild | 16 (6.0 %) |
| Moderate | 50 (18.9 %) |
| Severe | 199 (75.1 %) |
| Current or history of inhibitor (N, %) | |
| Yes | 52 (19.6) |
| No | 213 (80.4) |
| Age at study entry (years) | |
| Mean (SD) | 12.3 (3.33) |
| Median | 12.2 |
| Range | 7.0–19.1 |
| Inversion mutation (N, %) | |
| Yes | 98 (38.7 %) |
| No | 155 (61.3 %) |
| Number of study visits | |
| Mean (SD) | 10.4 (3.76) |
| Median | 11 |
| Range | 1–15 |
