| Characteristics | Categories | Psoriasis vulgaris (n = 35) | Psoriasis pustular (n = 26) | Psoriasis erythroderma (n = 24) | P-value |
| Age (years) |
| 47.3 ± 15.3 | 45.3 ± 14.6 | 57.1 ± 11.7 | 0.009# |
| Gender | Male | 22 (62.9) | 11 (42.3) | 15 (62.5) | 0.217 |
| Female | 13 (37.1) | 15 (57.7) | 9 (37.5) | ||
| BMI | <18.5 | 0 (0) | 3 (11.5) | 0 (0.0) | 0.086 |
| 18.5 - 24.9 | 20 (57.1) | 16 (61.5) | 18 (75) | ||
| 25 - 29.9 | 11 (31.4) | 5 (19.3) | 6 (25) | ||
| >30.0 | 4 (11.4) | 2 (7.7) | 0 (0.0) | ||
| Duration (months) |
| 10 (4.5, 20)* | 8 (3.25, 10.75)* | 10.25 (3.75, 22.5)* | 0.388 |
| Smoking history | Yes | 4 (11.4) | 3 (11.5) | 3 (12.5) | 0.991 |
| No | 31 (88.6) | 23 (88.5) | 21 (87.5) | ||
| Family history | Yes | 0 (0.0) | 2 (7.7) | 1 (4.2) | 0.268 |
| No | 35 (100) | 24 (92.3) | 23 (95.8) | ||
| Diabetes | Yes | 7 (20) | 3 (11.5) | 3 (12.5) | 0.599 |
| No | 28 (80) | 23 (88.5) | 21 (87.5) | ||
| Hypertension | Yes | 6 (17.1) | 3 (11.5) | 4 (16.7) | 0.815 |
| No | 29 (82.9) | 23 (88.5) | 20 (83.3) |