Table 2 Disease characteristics
| Â | SAF | EFF |
|---|---|---|
NÂ =Â 336 | NÂ =Â 302 | |
Age at first diagnosis of migraine (years) | ||
 N | 328 | 295 |
 Mean ± SD | 24.1 ± 9.0 | 24.0 ± 8.6 |
 Median (range) | 22 (8, 53) | 22 (8, 53) |
Time since diagnosis (years) | ||
 N | 328 | 295 |
 Mean ± SD | 17.5 ± 11.0 | 17.4 ± 10.7 |
 Median (range) | 17 (0, 52) | 17 (0, 52) |
Migraine associated with menstruation (women only) (N, %a) | ||
 No | 183 (62.7) | 167 (62.8) |
 Yes | 107 (36.6) | 98 (36.8) |
Aura (N, %b) | ||
 No | 234 (69.6) | 213 (70.5) |
 Yes | 102 (30.4) | 89 (29.5) |