Regression analyses of postural sway and physical disability (WOMAC score)
| Dependent variable |
Adjusted R2
(as percentage) | Independent variable | B | Standard error of B | t Value | Significance |
| (A) All subjects (n=104, 47 controls and 57 patients) | ||||||
| Postural sway | 47 | Constant | −0.912 | 0.43 | −2.13 | 0.035 |
| Knee OA+ | 0.23 | −0.05 | 4.56 | <0.001 | ||
| Weight (kg) | 0.004 | 0.002 | 2.80 | 0.005 | ||
| MVC3-150 (kgf) | −0.008 | 0.003 | −3.00 | 0.004 | ||
| (B) Knee OA + patients only (n=57) | ||||||
| Postural sway | 30 | Constant | −0.52 | 0.118 | −0.52 | 0.25 |
| MVC/weight (kgf/kg) | −0.41 | 0.122 | −3.33 | 0.002 | ||
| Pain (WOMAC score) | 0.030 | 0.009 | 2.90 | 0.001 | ||
| (C) Knee OA + patients only (n=57) | ||||||
| Physical disability | 66 | Constant | −10.01 | 9.20 | −1.09 | 0.28 |
| MVC (kgf) | −0.26 | 0.112 | −2.28 | 0.027 | ||
| Pain (WOMAC score) | 2.24 | 0.30 | 7.51 | <0.001 | ||
| Weight (kg) | 0.141 | 0.063 | 2.25 | 0.03 | ||
| Age (years) | 0.23 | 0.101 | 2.25 | 0.03 | ||
↵3-150 MVC = maximal voluntary quadriceps.