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Demographic and clinical characteristics of the sample
| Characteristic | n/M (SD) % | Range |
|---|---|---|
| Age (years) | 13.5 (1.57) | 11–16 |
| Gender | ||
| Male | 11 (36.7%) | |
| Female | 19 (63.3%) | |
| Headache diagnosis | ||
| Chronic daily headache | 16 (53.3%) | |
| Migraine | 14 (46.7%) | |
| Headache frequency | ||
| <1 time/month | 2 (6.7%) | |
| 1–3 times/month | 8 (26.7%) | |
| 1 time/week | 5 (16.7%) | |
| 2–3 times/week | 6 (20.0%) | |
| 3–5 times/week | 2 (6.7%) | |
| Daily | 6 (20.0%) | |
| Missing data | 1 (3.3%) | |
| Taking prophylactic medication | ||
| Yes | 16 (53.3%) | |
| No | 14 (46.7%) | |
