| Variables | Case (n = 22) | Control (n = 18) |
| Age (years), mean ± SD | 42.7 (7.7) | 43.1 (7.1) |
| Gender (n, %) |
|
|
| Male | 16 (72.7) | 13 (72.2) |
| Female | 6 (27.3) | 5 (27.8) |
| Duration of psoriasis (years), mean ± SD | 20.6 (11.2) | 19.2 (11.1) |
| Age at onset of psoriasis (years), mean ± SD | 22.7 (14.2) | 23.3 (12.4) |