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 | Â | Â | Â | 0.596 |
 Female: no. (%) | 15 (50%) | 29 (61.7%) | 23 (56.1%) | |
 Male: no. (%) | 15 (50%) | 18 (38.3%) | 18 (43.9%) | |
Thyroid function | Â | Â | Â | 0.009 |
 Euthyroid: no. (%) | 24 (80%) | 38 (80.9%) | 22 (53.7%) | |
 Hypothyroidism: no. (%) | 6 (20%) | 9 (19.1%) | 19 (46.3%) | |
Thyroid ultrasound | Â | Â | Â | 0.227 |
 Normal: no. (%) | 28 (93.3%) | 44 (93.6%) | 34 (82.9%) | |
 Abnormal: no. (%) | 2 (6.7%) | 3 (6.4%) | 7 (17.1%) |