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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 HEADACHESNumber of cases in participating study sampleNumber of cases after weightingWeighted one-year prevalences (%) with 95% CIs
All headache14671234.723.1 (22.0–24.3)
All migraine508404.17.6 (6.9–8.3)
Episodic migraine480375.67.0 (6.4–7.8)
  Definite198159.63.0 (2.6–3.5)
  Probable282216.04.0 (3.5–4.6)
Chronic migraine2828.50.5 (0.4–0.8)
  Definite1212.70.2 (0.1–0.4)
  Probable1615.80.3 (0.2–0.5)
All tension-type headache829703.313.2 (12.3–14.1)
Episodic TTH781654.912.2 (11.4–13.2)
  Definite558456.18.5 (7.8–9.3)
  Probable223198.83.7 (3.2–4.3)
Chronic TTH4848.40.9 (0.7–1.2)
  Definite3330.20.6 (0.4–0.8)
  Probable1518.20.3 (0.2–0.5)
Trigeminal autonomic cephalalgias25.30.1 (0.0004–0.2)
Other primary headaches5557.11.1 (0.8–1.4)
Chronic daily headache (headache > 15 days a month)7676.91.4 (1.1–1.8)
Unidentifiable4341.80.8 (0.6–1.1)
  1. TTH tension-type headache
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