Table 5 Results of univariate and multivariate analyses
Hip abductor strength | Step 1 | Step 2 | Step 3 | ||||||
| Â | R | p value | 95%CI | B | p value | 95%CI | B | p value | 95%CI |
Preoperative muscle strength | 6.02×10-1 | <.001 | 3.86×10-1 to 8.17×10-1 | 4.58×10-1 | <.001* | -1.14×10-4 to -7.74×10-6 |  |  |  |
Age |  |  |  | -3.10×10-1 | .033* | -5.90×10-1 to -3.04×10-2 |  |  |  |
Height (cm) |  |  |  | 1.08×10-1 | .672 | -3.90×10-1 to 6.06×10-1 |  |  |  |
Body weight (kg) |  |  |  | 3.29×10-1 | .009* | 8.71×10-2 to 5.71×10-1 |  |  |  |
Physical activity (steps) |  |  |  | 1.50×10-3 | .005* | 4.79×10-4 to 2.53×10-3 |  |  |  |
Leg extension (mm) |  |  |  | -3.18×10-1 | .017* | 5.74×10-1 to 6.32×10-2 |  |  |  |
Disease duration (years) |  |  |  | -2.67×10-2 | .004* | -3.10×10-1 to 2.56×10-1 |  |  |  |
Knee extensor strength | Step 1 | Step 2 | Step 3 | ||||||
| Â | R | p value | 95%CI | B | p value | 95%CI | B | p value | 95%CI |
Preoperative muscle strength | -1.12×10-4 | <.001 | -1.14×10-4 to -7.74×10-6 | -8.50×10-5 | <.001* | -1.14×10-4 to -7.74×10-6 | -8.97×10-5 | <.001* | -1.24×10-4 to -5.44×10-6 |
Age |  |  |  | 1.06×10-4 | .010* | 2.78×10-5 to 1.83×10-4 | 1.04×10-4 | .009* | 2.87×10-5 to 1.80×10-4 |
Height (cm) |  |  |  | -6.21×10-5 | .348 | -1.91×10-4 to 6.67×10-5 | -3.17×10-5 | .635 | -1.61×10-4 to 9.86×10-5 |
Body weight (kg) |  |  |  | -5.86×10-5 | .071 | -1.21×10-4 to 4.49×10-6 | -6.51×10-5 | .043* | -1.26×10-4 to -2.78×10-6 |
Physical activity (steps) |  |  |  | -3.31×10-7 | .019* | -5.97×10-7 to -5.77×10-8 | -2.80×10-7 | .043* | -5.44×10-7 to -1.12×10-8 |
Leg extension (mm) |  |  |  | 1.43×10-5 | .704 | -5.78×10-5 to 8.94×10-5 | 1.70×10-5 | .647 | -5.39×10-5 to 9.06×10-5 |
Disease duration (years) |  |  |  | 1.27×10-4 | .004* | 4.49×10-5 to 2.11×10-4 | 1.31×10-4 | .002* | 5.08×10-5 to 2.14×10-4 |
Age*Preoperative muscle strength |  |  |  |  |  | -5.90×10-6 | .046* | 4.49×10-5 to 2.11×10-4 | |