| group A (n =35) | group D (n = 22) | |
| Gender (male, female) | 7, 28 | 3, 19 |
| Age (yr) | 72.8 ± 6.1 | 73.5 ± 6.2 |
| Height (cm) | 152.0 ± 5.4 | 152.5 ± 6.8 |
| Weight (kg) | 59.5 ± 8.5 | 59.9 ± 7.2 |
| BMI (kg/m2) | 25.7 ± 2.9 | 25.7 ± 2.5 |
| type of bearing insert used | 32, 3 | 19, 3 |