Table 1 Patient characteristics
|  | Total (n = 63) | Group S (n = 37) | Group A (n = 26) | P value* between groups S and A |
|---|---|---|---|---|
Mean age (years) (SD; range) | 72.4 (8.1; 45–86) | 71.8 (8.0; 45–84) | 73.3 (8.3; 61–86) | 0.4 |
Male, n (%) | 8 (12.7) | 4 (10.8) | 4 (15.4) | 0.7 |
Pre-operative hip–knee–ankle angle (°) (SD; range) | 10.6 (5.8; 1–27) | 10.1 (6.6; 1–27) | 11.3 (4.5; 1–20) | 0.3 |
Pre-operative flexion angle (°) (SD; range) | 130.9 (12.7; 85–150) | 133.0 (8.2; 120–145) | 128.3 (16.6; 85–150) | 0.5 |