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Table 3 One-year prevalence of headache1 in HUNT2, HUNT3 and HUNT4 among individuals who participated in all three surveys (n = 16,118)

From: Time trends of major headache diagnoses and predictive factors. Data from three Nord-Trøndelag health surveys

Headache typeHUNT2%, (95% CI)HUNT3%, (95% CI)HUNT4%, (95% CI)
Headache sufferer44.4 (43.7 to 45.2)36.1 (35.5 to 36.7)28.8 (28.2 to 29.4)
Migraine13.3 (12.7 to 13.7)11.1 (10.6 to 11.6)6.9 (6.5 to 7.3)
Episodic migraine < 15 days/month12.7 (12.2 to 13.2)10.5 (10.1 to 11.0)6.4 (6.0 to 6.8)
Chronic migraine (≥15 days/month)0.6 (0.5 to 0.7)0.6 (0.5 to 0.7)0.5 (0.4 to 0.6)
Migraine with aura4.8 (4.5 to 5.1)5.6 (5.2 to 5.9)3.6 (3.3 to 3.9)
Migraine without aura8.5 (8.0 to 8.9)5.5 (5.2 to 5.9)3.3 (3.0 to 3.5)
Medication overuse headache0.8 (0.7 to 1.0)0.9 (0.8 to 1.1)0.4 (0.3 to 0.5)
Unclassified headaches230.3 (29.5 to 31.1)24.1 (23.5 to 24.7)21.5 (21.0 to 22.0)
  1. 1 Mutually exclusive headache diagnoses: The diagnosis of migraine excluded the diagnosis of TTH, and TTH excluded probable migraine. The diagnosis of MOH excluded the diagnoses of chronic migraine and chronic unclassified headache
  2. 2 Unclassified headache: Not fulfilling criteria of migraine