Patient demographic and clinical characteristics
| Characteristic | No. (%) of patients* |
|---|---|
| Female sex (n = 2178) | 1359 (62.4) |
| Age, yr, mean ± SD | 64.7 ± 10.7 |
| Body mass index, mean ± SD | 35.0 ± 8.5 |
| Cobalt–chromium implant (n = 2815) | 2286 (81.2) |
| Length of follow-up, yr, mean ± SD | 3.2 ±1.9 |
SD = standard deviation.
↵* Except where noted otherwise.