Table 1 Patient characteristics by implant type
| Â | Durom | Birmingham | Pinnacle | p valuea |
|---|---|---|---|---|
Age in years (mean ± SD) | 61.7 ± 5.9 | 60.4 ± 11.3 | 56.5 ± 9.2 | 0.2251 |
Female sex | 31.6% | 73.7% | 93.8% | 0.0003 |
(6/19) | (14/19) | (15/16) | ||
BMI (mean ± SD) | 30.2 ± 7.1 | 30.7 ± 7.4 | 28.4 ± 4.3 | 0.5559 |
Diabetes | 5.3% | 5.3% | 0.0% | 1.0000 |
(1/19) | (1/19) | (0/16) | ||
Smoking | 15.8% | 21.1% | 12.5% | 0.9011 |
(3/19) | (4/19) | (2/16) | ||
SF-36 (mean ± SD) | 85.6 ± 12.0 | 84.1 ± 12.5 | 79.6 ± 18.7 | 0.4639 |
Harris hip score (mean ± SD) | 80.0 ± 15.9 | 76.4 ± 15.3 | 78.1 ± 16.9 | 0.7832 |
UCLA activity scale (mean ± SD) | 6.5 ± 1.7 | 7.1 ± 1.7 | 7.1 ± 1.3 | 0.4456 |
WOMAC score (mean ± SD) | 84.3 ± 11.8 | 82.2 ± 13.7 | 80.7 ± 13.2 | 0.7122 |
Cobalt (μg/l) median (25th, 75th percentile) | 2.8 | 3.3 | 0.5 | <0.001 |
(1.5,3.6) | (1.4,4.1) | (0.4,0.7) | ||
Chromium (μg/l) median (25th, 75th percentile) | 2.0 | 2.2 | 1.2 | <0.001 |
(1.5,2.5) | (1.5,2.7) | (1.0,1.4) | ||
Head size (mm) median (25th, 75th percentile) | 48.0 | 48.0 | 40.0 | <0.0001 |
(44.0,50.0) | (44.0,54.0) | (40.0,40.0) |