Demographic characteristics.
| Characteristic | Ashkenazi, n = 57 | Iraqi, n = 62 | North African, n = 61 | p* |
|---|---|---|---|---|
| Male (%) | 57.9 | 59.7 | 49.2 | NS |
| Family history of FMF (%) | 29.8 | 82.3 | 77 | < 0.001 |
| Age at FMF onset (yrs ± SD) | 21.6 ± 13.6 | 25.4 ± 14.9 | 9.6 ± 9.1 | < 0.001 |
| Age at FMF diagnosis (yrs ± SD) | 34.3 ± 15.9 | 34.9 ± 13.3 | 16.6 ± 12.2 | < 0.001 |
| Diagnostic delay (yrs ± SD) | 12.8 ± 12.1 | 9.8 ± 10.9 | 7.0 ± 8.8 | 0.016 |
↵*North African vs Ashkenazi Jewish extraction. NS: not significant; FMF: familial Mediterranean fever; SD: standard deviation.