Multivariate analysis of predictors of ExRA Malmö* manifestations
| Predictor | Risk ratio | 95% Confidence interval |
|---|---|---|
| *According to criteria 1–8 (table 1); | ||
| †at RA diagnosis. | ||
| Age (per year) | 1.019 | 1.00 to 1.038 |
| Male sex | 0.98 | 0.59 to 1.63 |
| Ever smoking† | 2.94 | 1.68 to 5.13 |
| Steinbrocker class III–IV† | 2.45 | 1.51 to 4.00 |