| | n (%) | Headache (any type) during the preceding year (%) |
|---|
| Yes | No | p |
|---|
| Total | 3386 (100%) | 75.7% | 24.3% | |
| Gender |
| Girls | 1874 (55.4%) | 82.1% | 17.9% | Chi2 = 93.9, p < 0.001 |
| Boys | 1500 (44.5%) | 67.7% | 32.3% |
| Missing | 12 | | |
| School grade |
| 5th grade | 496 (14.6%) | 63.9% | 36.1% | Chi2 = 49.9, p < 0.001 |
| 7th grade | 865 (25.5%) | 77.3% | 22.7% |
| 9th grade | 1087 (32.1%) | 75.6% | 24.4% |
| 11th grade | 938 (27.7%) | 80.4% | 19.6% |
| Socioeconomic statusa |
| Low | 766 (23.4%) | 76.2% | 23.8% | Chi2 = 0.4, p = 0.808 |
| Medium | 1750 (53.5%) | 76.1% | 23.9% |
| High | 756 (23.1%) | 75.0% | 25.0% |
| Missing | 114 | | |
| Family constellation |
| Both biological parents | 2437 (74.3%) | 74.8% | 25.2% | Chi2 = 7.2, p = 0.027 |
| Single parent | 547 (16.7%) | 78.8% | 21.2% |
| Patchwork | 295 (9.0%) | 79.7% | 20.3% |
| Missing | 107 | | |
| Place of residencea |
| Urban | 1955 (58.5%) | 75.9% | 24.1% | Chi2 = 0.4, p = 0.524 |
| Rural | 1385 (41.5%) | 74.9% | 25.1% |
| Missing | 46 | | |
| Migration backgrounda |
| No | 2470 (74.3%) | 76.4% | 23.6% | Chi2 = 2.9, p = 0.088 |
| Yes | 855 (25.7%) | 73.5% | 26.5% |
| Missing | 61 | | |
- aSee text for explanations
