Characteristics of patients in whom blood metal ion levels were tested at long-term follow-up
| Characteristic | Study cohort (n = 71 patients) | ||
|---|---|---|---|
| Total | Unilateral BHR | Bilateral BHR | |
| Gender, n (%) | 71 (100) | 56 (79) | 15 (21) |
| Male | 54 (76) | 43 (61) | 11 (15) |
| Female | 17 (24) | 13 (18) | 4 (6) |
| Age at surgery, mean ± SD (range), yr | 49.4 ± 7.6 (24–68) | 49.1 ± 8.6 (24–68) | 50.0 ± 4.7 (39–55) |
| Male | 50.9 ± 6.6 (36–68) | 51.6 ± 6.9 (36–68) | 48.7 ± 5.3 (39–54) |
| Female | 44.1 ± 9.0 (24–55) | 40.6 ± 8.7 (24–53) | 52.1 ± 2.5 (49–55) |
| Body mass index at surgery, mean ± SD, kg/m2 | 28.1 ± 6.0 | 27.2 ± 3.5 | 29.9 ± 9.0 |
| Male | 28.4 ± 5.2 | 27.8 ± 2.5 | 30.8 ± 10.9 |
| Female | 25.6 ± 5.1 | 24.6 ± 4.9 | 28.3 ± 5.4 |
| Follow-up, mean ± SD (range), yr | 12.7 ± 1.4 (10–15.1) | 12.7 ± 1.3 (10–15.1) | 12.4 ± 1.6 (10–15.1) |
BHR = Birmingham Hip Resurfacing; SD = standard deviation.