Characteristics stratified by patient association membership status
| Associated (mean±SD or%) | Non-Associated (mean±SD or%) | P | |
|---|---|---|---|
| Age (years) | 49.7±11.2 | 42.4±9.4 | <0.001 |
| Gender (Male) | 57.8% | 39.3% | <0.001 |
| Education Level (University) | 34.6% | 38.8% | 0.3 |
| Marital Status (Married) | 79.1% | 65.4% | <0.001 |
| Smoker | 32.6% | 41.6% | <0.01 |
| Disease duration (years) (n=555) | 26.0±12.4 | 17.0±10.3 | <0.001 |
| HLA-B27 (Positive) (n=558) | 79.7% | 74.9% | 0.097 |
| Treatment | |||
| - NSAIDs (without biology) | 28.6% | 30.9% | 0.5 |
| - Biological (monotherapy or with NSAIDs) | 39.2% | 34.0% | 0.2 |
| BASDAI (0–10) (n=442) | 5.1±2.1 | 5.8±2.1 | 0.001 |
| Stiffness -Without Stiffness - low - mild - high | <0.01 | ||
| 10.2% | 11.2% | ||
| 17.6% | 20.0% | ||
| 27.8% | 38.6% | ||
| 44.5% | 30.2% | ||
| Functional Limitation (0–54) (n=605) | 26.5±13.4 | 28.7±12.9 | 0.038 |
| GQH-12 (0–12) (n=474) | 4.9±4.5 | 6.5±4.4 | <0.001 |