| Age (mean ± SD) | 47.7 (13.16) | 48.3 (14.3) | 0.1 | -5.757 to 0.912 |
| Gender (M:F) ratio | 28:89 (1:3.1) | 219:419 (1:1.9) | 0.3 | -0.025 to 0.077 |
| Disease duration (y) (mean ± SD) | 11.4 (12.1) | 10.9 (10.8) | 0.4 | -1.905 to 4.470 |
| Delay in diagnosis (y) (mean ± SD) | 6.43 (8.9) | 6.3 (8.1) | 0.7 | -3.151 to 2.151 |
| ESR (mean ± SD) mmHg | 15.5 (14.8) | 18.2 (18) | 0.07 | -11.064 to 0.582 |
| CRP (mean ± SD) mg/dL | 10.4 (36) | 8.2 (9.8) | 0.4 | -6.106 to 12.536 |
| BASDAI score (mean ± SD) | 7.31 (3.7) | 6.06 (2.08) | <0.005 | 0.783 to 2.624 |
| BASFI score (mean ± SD) | 5.6 (2.7) | 5.04 (2.7) | 0.09 | -0.143 to 1.626 |
| Buttock pain (%) | 31.6 | 12.8 | 0.001 | 0.083 to 0.293 |
| Back pain (%) | 82.9 | 58.8 | <0.005 | 0.125 to 0.337 |
| Neck pain (%) | 72.6 | 24.4 | <0.005 | 0.340 to 0.583 |
| Knee pain (%) | 63.2 | 30.6 | <0.005 | 0.284 to 0.520 |
| Shoulder (%) | 70.9 | 23 | <0.005 | 0.312 to 0.559 |
| Foot (%) | 57.2 | 22 | <0.005 | 0.279 to 0.524 |
| Hip (%) | 55.5 | 19.9 | <0.005 | 0.217 to 0.467 |
| Eye (%) | 23 | 4.3 | <0.005 | 0.102 to 0.274 |
| Fatigue | 77/116 (66.4%) | 340/608 (55.9%) | 0.018 | 0.029 to 0.299 |
| Pain with pressure | 71/117 (61.2%) | 257/807 (42.4%) | 0.000 | 0.122 to 0.378 |
| Headache as co-morbidity | 95 (109) 87.2% | 195/509 (38.3%) | 0.000 | 0.808 to 0.935 |