| | Data | Patients with positive thyroid antibody, | Patients with negative
thyroid antibody, | value |
| Gender,
(%) | Female, 79 (77.5%) | Female, 127 (57.0%) | <0.001 | | Male, 23 (22.5%) | Male, 96 (43.0%) |
| Fitzpatrick
skin type,
(%) | III: 17 (16.7%) | III: 44 (19.7%) | 0.26 | | IV: 71 (69.6%) | IV: 161 (72.2%) | | V: 14 (13.7%) | V: 18 (8.1%) |
| | Family history of vitiligo, (%) | 23 (22.6%) | 52 (23.3%) | 0.88 |
| | Family history of autoimmune diseases, (%) | 17 (16.7%) | 22 (9.9%) | 0.08 |
| Age of onset,
median (range) | 40 (0–69) | 34 (1–74) | 0.055 |
| Location,
(%) | Hand, 38 (37.3%) | Hand, 55 (24.7%) | 0.02 | | Head/neck, 34 (33.3%) | Head/neck, 109 (48.9%) | 0.009 | | Arm, 15 (14.1%) | Arm, 21 (9.4%) | 0.16 |
| | Median body surface area involvement (range) | 3% | 2% | 0.12 | | (0.3–90%) | (0.1–50%) |
| Type of vitiligo,
(%) | Nonsegmental, 87 (85.3%) | Nonsegmental, 178 (79.8%) | 0.451 | | Segmental, 11 (10.8%) | Segmental, 30 (13.5%) |
| Leukotrichia,
(%) | 45 (44.1%) | 116 (52%) | 0.186 |
| Koebner’s phenomenon,
(%) | IIA: 33 (32.3%) | IIA: 51 (22.9%) | 0.07 | | IIB: 38 (37.3%) | IIB: 79 (35.4%) | 0.75 | | III: 2 (2%) | III: 1 (0.5%) | 0.233 |
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