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Demographic characteristics of patient groups.
| Group OA | Group RA | |
|---|---|---|
| Number of patients | 206 | 182 |
| Number of knees investigated | 273 | 304 |
| Median age at time of surgery | 64.4 years (range, 47–87) | 50.7 years (range, 21–72) |
| Male/female | 83/123 | 92/90 |
| Mean follow-up | 101.3 months (range, 60–152) | 102.6 months (range, 60–142) |
