| Variables | Case (n = 22) | Control (n = 18) |
| Clinical severity of psoriasis by PASI score at pre-intervention | 21.45 (10.52) | 20.35 (10.26) |
| Clinical severity of psoriasis by PASI score at post-intervention | 2.69 (1.76) | 2.03 (1.71) |
| Clinical severity of arthritis score at pre-intervention | 8.45 (1.56) | 8.39 (1.64) |
| Clinical severity of arthritis score at post-intervention | 1.25 (1.06) | 3.19 (1.15)* |