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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 type

HUNT2%, (95% CI)

HUNT3%, (95% CI)

HUNT4%, (95% CI)

Headache sufferer

44.4 (43.7 to 45.2)

36.1 (35.5 to 36.7)

28.8 (28.2 to 29.4)

Migraine

13.3 (12.7 to 13.7)

11.1 (10.6 to 11.6)

6.9 (6.5 to 7.3)

Episodic migraine < 15 days/month

12.7 (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 aura

4.8 (4.5 to 5.1)

5.6 (5.2 to 5.9)

3.6 (3.3 to 3.9)

Migraine without aura

8.5 (8.0 to 8.9)

5.5 (5.2 to 5.9)

3.3 (3.0 to 3.5)

Medication overuse headache

0.8 (0.7 to 1.0)

0.9 (0.8 to 1.1)

0.4 (0.3 to 0.5)

Unclassified headaches2

30.3 (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