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| Characteristics (n = 1,627) | No. of patients (%) |
|---|---|
| Gender (Female) | 1,022 (62.8) |
| Durations of headache history* | |
| ≤7 days | 464 (28.5) |
| 8 days-1 month | 343 (21.1) |
| 1 month-1 yr | 371 (22.8) |
| >1 yr | 445 (27.4) |
| Age of headache onset (yr) | |
| ≤20 | 100 (6.1) |
| 21-30 | 285 (17.5) |
| 31-40 | 339 (20.8) |
| 41-50 | 340 (20.9) |
| 51-60 | 313 (19.2) |
| 61-70 | 167 (10.3) |
| ≥71 | 83 (5.1) |
*Data of headache duration were not available for 4 cases.
