Table 2 Weighted one-year prevalences of primary headaches in the online study
From: The applicability of web-based solutions in headache epidemiology research
| PRIMARY HEADACHES | Number of cases in participating study sample | Number of cases after weighting | Weighted one-year prevalences (%) with 95% CIs |
|---|---|---|---|
| All headache | 1467 | 1234.7 | 23.1 (22.0–24.3) |
| All migraine | 508 | 404.1 | 7.6 (6.9–8.3) |
| ● Episodic migraine | 480 | 375.6 | 7.0 (6.4–7.8) |
| Definite | 198 | 159.6 | 3.0 (2.6–3.5) |
| Probable | 282 | 216.0 | 4.0 (3.5–4.6) |
| ● Chronic migraine | 28 | 28.5 | 0.5 (0.4–0.8) |
| Definite | 12 | 12.7 | 0.2 (0.1–0.4) |
| Probable | 16 | 15.8 | 0.3 (0.2–0.5) |
| All tension-type headache | 829 | 703.3 | 13.2 (12.3–14.1) |
| ● Episodic TTH | 781 | 654.9 | 12.2 (11.4–13.2) |
| Definite | 558 | 456.1 | 8.5 (7.8–9.3) |
| Probable | 223 | 198.8 | 3.7 (3.2–4.3) |
| ●Chronic TTH | 48 | 48.4 | 0.9 (0.7–1.2) |
| Definite | 33 | 30.2 | 0.6 (0.4–0.8) |
| Probable | 15 | 18.2 | 0.3 (0.2–0.5) |
| Trigeminal autonomic cephalalgias | 2 | 5.3 | 0.1 (0.0004–0.2) |
| Other primary headaches | 55 | 57.1 | 1.1 (0.8–1.4) |
| Chronic daily headache (headache > 15 days a month) | 76 | 76.9 | 1.4 (1.1–1.8) |
| Unidentifiable | 43 | 41.8 | 0.8 (0.6–1.1) |