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Table 2 Age-and sex adjusted 1-year prevalence of different headache types1 in HUNT3 and HUNT4

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

Headache type

HUNT3 (n = 39,697)

%, (95% CI)

HUNT4 (n = 41,460)

%, (95% CI)

P values

Headache sufferer

36.2 (35.9 to 36.5)

37.3 (37.0 to 37.6)

0.002

Migraine

12.0 (11.5 to 12.5)

11.2 (10.9 to 11.5)

< 0.001

Episodic migraine < 15 days/month

11.7 (11.4 to 12.0)

10.3 (10.0 to 10.6)

< 0.001

Chronic migraine (≥15 days/month)

0.3 (0.2 to 0.4)

0.8 (0.7 to 0.9)

0.007

Migraine with aura

5.9 (5.7 to 6.2)

5.9 (5.7 to 6.2)

0.11

Migraine without aura

6.0 (5.7 to 6.2)

5.3 (5.1 to 5.5)

< 0.001

Probable migraine

7.4 (7.1 to 7.7)

4.8 (4.6 to 5.0)

< 0.001

TTH2

15.9 (15.6 to 16.3)

20.7 (20.3 to 21.1)

< 0.001

Infrequent episodic TTH < 1 days/month

4.5 (4.3 to 4.7)

5.5 (5.3 to 5.7)

< 0.001

Episodic TTH 1–14 days/month

10.8 (10.5 to 11.1)

14.1 (13.7 to 14.4)

< 0.001

Chronic TTH (> 14 days/month)

0.6 (0.5 to 0.7)

1.0 (0.9 to 1.1)

< 0.001

Medication overuse headache (MOH)1

1.0 (0.9 to 1.1)

0.3 (0.2 to 0.3)

< 0.001

Unclassified headaches3

1.1 (1.0 to 1.2)

0.6 (0.5 to 0.7)

< 0.001

  1. 1 Mutually exclusive headache diagnoses: The diagnosis of definite migraine excluded the diagnosis of TTH, and TTH excluded probable migraine. The diagnosis of MOH excluded the diagnoses of chronic TTH, chronic migraine and chronic unclassified headache.
  2. 2 TTH tension-type headache
  3. 3 Unclassified headache: Not fulfilling criteria of migraine, probable migraine or THH