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NSAIDs; nonsteroidal anti-inflammatory drugs, RF; rheumatoid factor
| Variable | P-value | Odds ratio |
| Nationality | 0.143 | 1.48 |
| RF | 0.64 | 0.65 |
| Vasculitis | 4.66 | 1.23 |
| Allergic reaction to taken biological therapy | 0.998 | 5.04 |
| NSAID | 0.165 | 1.58 |
| Steroid dose | 0.023 | 1.79 |
| Duration | 0.177 | 0.99 |
