| Age (yrs) | | 52.79 (±12.29) | 53.05 (±12.23) | 52.43 (±12.41) |
| Gender (m/f) | 461 | 263/198 | 263 | 198 |
| Symptoms duration | 450 | 11.91 (±10.83) | 11.37 (±9.79) | 12.64 (±12.08) |
| Disease duration (yrs) | 459 | 8.60 (±9.30) | 8.46 (±8.74) | 8.79 (±10.00) |
| Family historyPsA | 456 | 47 (10.3%) | 27 (10.3%) | 20 (10.3%) |
| Psoriasis type 1% | 444 | 287 (64.6%) | 165 (63.7%) | 122 (65.9%) |
| BSA (%) | 279 | 5.25 (±10.50) | 6.10±12.11 | 3.99 (±7.35) |
| Nail % | 459 | 122 (26.6%) | 85 (32.3%) | 37 (18.9%) |
| Clinical involvement at entry | | N of total | N of male (263) | N of female (198) |
| Dactylitis | 461 | 64 (13.9%) | 41 (15.58%) | 23 (11.61%) |
| Enthesitis | 461 | 111 (24.1%) | 51 (19.39%) | 60 (30.30%) |
| SJ count | 461 | 2.13 (±4.53) | 2.32 (±5.23) | 1.89 (±3.3) |
| TJ count | 461 | 4.10 (±7.31) | 3.72 (±6.79) | 4.61 (±7.95) |
| Abnormal CRP (≥5mg/l) | 430 | 125 (29.1%) | 64 (25.3%) | 61 (34.5%) |
| Physician Global | 429 | 24.61 (±21.18) | 22.84 (±20.72) | 27.00 (±21.62) |
| Patient global | 380 | 36.42±23.47 | 33.06 (±23.43) | 40.89 (±22.83) |
| HAQ | 460 | 0.72 (±0.64) | 0.64 (±0.63) | 0.83 (±0.63) |
| Workstatus: unemployed | 450 | 224 (49.8%) | 120 (46.7%) | 104 (539%) |