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Table 5 Results of univariate and multivariate analyses

From: A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term

Hip abductor strength Step 1 Step 2 Step 3
  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
  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
  1. Abbreviations: CI confidence interval
  2. Step 2 yielded the final model for hip abductor strength. Step 3 yielded the final model for knee extensor strength. R = regression coefficient, B = partial regression coefficient. *: <0.05