Analysis of the association between baseline characteristics of the patients and presence of a bad functional outcome at the 2-year follow-up visit
| Patients having a bad functional outcome at 24 months | p Value | |
|---|---|---|
| ASAS criteria | ||
| No | 48/141 (34%) | 0.004 |
| Yes | 79/367 (21.5%) | |
| HLA B27 | ||
| No | 65/204 (31.9%) | 0.007 |
| Yes | 65/309 (21%) | |
| MRI sacroiliitis | ||
| No | 100/358 (27.9%) | 0.008 |
| Yes | 24/143 (16.8%) | |
| MRI spine abnormalities | ||
| No | 99/384 (25.8%) | 0.32 |
| Yes | 23/110 (20.9%) | |
| X-rays sacroiliitis | ||
| No | 101/359 (28.1%) | 0.057 |
| Yes | 29/146 (19.9%) | |
| Baseline mSASS≥0.5 | ||
| No | 99/390 (25.4%) | 0.42 |
| Yes | 21/89 (23.6%) | |
| Gender | ||
| Female | 84/279 (30.1%) | 0.008 |
| Male | 46/234 (19.7%) | |
| Age (years) | ||
| <33 | 45/258 (17.4%) | <0.0001 |
| >33 | 85/255 (33.3%) | |
| Educational level | ||
| ≤College | 73/193 (37.8%) | <0.0001 |
| >College | 53/312 (17%) | |
| Peripheral arthritis | ||
| No | 46/219 (21%) | 0.052 |
| Yes | 84/294 (28.6%) | |
| Smoking | ||
| No | 67/333 (20.1%) | 0.001 |
| Yes | 61/177 (34.5%) | |
| ASDASCRP | ||
| ≤3.5 | 91/416 (21.9%) | <0.0001 |
| >3.5 | 31/73 (42.4%) | |
| BASDAI | ||
| ≤4.5 | 32/259 (12.4%) | <0.0001 |
| >4.5 | 96/250 (38.4%) | |
| CRP | ||
| ≤5 mg/L | 78/328 (23.8%) | 0.38 |
| >5 mg/L | 46/167 (27.5%) | |
| ESR (mm) | ||
| ≤28 | 114/445 (25.6%) | 0.72 |
| >28 | 10/46 (21.7%) | |
CRP, C reactive protein; ESR, estimated sedimentation rate.