Table 2.
Clinical characteristics of the migraine patient sample
| Edinburgh (N = 98) |
London (N = 102) |
Total migraine patient sample (N = 200) |
p valuea | |
|---|---|---|---|---|
| Diagnosed with migraines (n, %) | 98 (100.0%) | 102 (100.0%) | 200 (100.0%) | |
| Days per month with headache symptoms (mean, SD) | 9.2 (7.8) | 9.1 (7.9) | 9.2 (7.8) | 0.97 |
| Days per month with migraine symptoms (mean, SD) | 8.7 (7.3) | 9.1 (7.4) | 8.9 (7.3) | 0.66 |
| Time of most recent migraine (n, %) | 0.49 | |||
| Within the past 24 h | 21 (21.4%) | 21 (20.6%) | 42 (21.0%) | |
| Within the past week | 32 (32.7%) | 47 (46.1%) | 79 (39.5%) | |
| Within the past month | 32 (32.7%) | 24 (23.5%) | 56 (28.0%) | |
| Within the past 3 months | 6 (6.1%) | 6 (5.9%) | 12 (6.0%) | |
| Within the past 6 months | 5 (5.1%) | 3 (2.9%) | 8 (4.0%) | |
| Within the past year | 1 (1.0%) | 0 (0.0%) | 1 (0.5%) | |
| More than 1 year ago | 1 (1.0%) | 1 (1.0%) | 2 (1.0%) | |
| Age at first migraine (mean, SD) | 20.1 (9.7) | 22.3 (12.4) | 21.2 (11.2) | 0.18 |
aP values are based on Chi-square analyses for categorical variables and t tests for continuous variables