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Table 3 Comparison of weighted one-year prevalences of primary headaches in Estonia [6] and in the online sample

From: The applicability of web-based solutions in headache epidemiology research

PRIMARY HEADACHESWeighted one-year prevalences (%) with 95% CIs in Estonian population aged 20–64Weighted one-year prevalences (%) with 95% CIs in the online study sample
All headache41.0 (38.2–43.8)23.1 (22.0–24.3)
All migraine17.7 (15.7–20.0)7.6 (6.9–8.3)
Episodic migraine16.8 (14.8–19.1)7.0 (6.4–7.8)
  Definite6.6 (5.3–8.2)3.0 (2.6–3.5)
  Probable10.2 (8.6–12.1)4.0 (3.5–4.6)
Chronic migraine0.9 (0.5–1.7)0.5 (0.4–0.8)
  Definite0.7 (0.4–1.4)0.2 (0.1–0.4)
  Probable0.2 (< 0.1–0.7)0.3 (0.2–0.5)
All tension-type headache18.0 (15.9–20.3)13.2 (12.3–14.1)
Episodic TTH16.5 (14.4–18.7)12.2 (11.4–13.2)
  Definite11.8 (10.1–13.8)8.5 (7.8–9.3)
  Probable4.7 (3.6–6.0)3.7 (3.2–4.3)
Chronic TTH1.5 (1.0–2.5)0.9 (0.7–1.2)
  Definite1.5 (0.9–2.4)0.6 (0.4–0.8)
  Probable0.1 (< 0.001–0.5)0.3 (0.2–0.5)
Trigeminal autonomic cephalalgias0.4 (0.1–1.0)0.1 (0.0004–0.2)
Other primary headaches2.5 (1.7–3.5)1.1 (0.8–1.4)
Chronic daily headache (headache > 15 days a month)2.7 (1.9–3.8)1.4 (1.1–1.8)
Unidentifiable2.0 (1.3–3.0)0.8 (0.6–1.1)
  1. TTH tension-type headache
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