Table 1 Sample characteristics
From: A genome-wide analysis in cluster headache points to neprilysin and PACAP receptor gene variants
| Â | Cluster headache patients | Controls |
|---|---|---|
N | 99 | 359 |
Gender (N,%) | ||
 Male | 83, 83.84% | 204, 56.82% |
 Female | 16, 16.16% | 155, 43.18% |
Age, ys (mean ± sd, range) | 47.39 ± 13.12, 23–81 | 48.96 ± 11.91, 18–70 |
CH attacks | ||
Age at onset, ys (mean ± sd, range) | 30.04 ± 12.65, 6–80 |  |
Chronic (N, %) | 14, 14.14% | Â |
N attacks/year (mean ± sd, range) | 1.29 ± 0.77, 0.17–4 |  |
N attacks/day (mean ± sd, range) | 2.85 ± 1.68, 1–9 |  |
Smoking | ||
Ever smoking (N,%) | 88, 88.89% | 359, 100% |
N cigarette/day (mean ± sd) | 19.17 ± 10.83 | 21.77 ± 9.13 |
Fagerström test (mean ± sd); N | 4.60 ± 2.54 (N = 72) | 5.95 ± 2.21 |