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Table 5 Intragroup analysis between tension headache subtypes

From: Migraine and tension headache comorbidity with hypothyroidism in Egypt

Characteristic Frequent TTH (n = 30) Infrequent TTH (n = 47) Chronic TTH (n = 41) p
Age (years): mean ± SD 39.3 ± 7.1 42.3 ± 7.3 44.5 ± 6.3b 0.010
Duration (years) median (range) 6.5 (3.8-11) 10 (5-14) 13 (11-16) 0.001
Sex     0.596
 Female: no. (%) 15 (50%) 29 (61.7%) 23 (56.1%)
 Male: no. (%) 15 (50%) 18 (38.3%) 18 (43.9%)
Thyroid function     0.009
 Euthyroid: no. (%) 24 (80%) 38 (80.9%) 22 (53.7%)
 Hypothyroidism: no. (%) 6 (20%) 9 (19.1%) 19 (46.3%)
Thyroid ultrasound     0.227
 Normal: no. (%) 28 (93.3%) 44 (93.6%) 34 (82.9%)
 Abnormal: no. (%) 2 (6.7%) 3 (6.4%) 7 (17.1%)
  1. P value is significant if ≤ 0.050
  2. TTH tension type headache