Multivariate logistic regression analysis of characteristics statistically associated with progression to ankylosing spondylitis.
| Variable | Coefficient | Standard Error | p | OR | Lower 95% IC | Upper 95% IC |
|---|---|---|---|---|---|---|
| Buttock pain | 1.826 | 0.695 | 0.009 | 6.211 | 1.591 | 24.252 |
| B27 | 1.905 | 0.903 | 0.035 | 6.720 | 1.145 | 39.434 |
| Constant | −2.641 | 0.954 | 0.006 |