Table 4

Association of disability (WOMAC function score >19) with anxiety, depression, voluntary quadriceps strength (MVC), quadriceps activation, and radiographic score in subjects with knee pain. Odds ratios have been calculated using logistic regression and are adjusted for age, sex, and BMI in addition to the variables shown. For bilateral variables, the worst value from either limb has been used in analysis

DisabilityOdds ratio95% Confidence intervals
yes (%)no (%)
Anxiety
<849 (35.3)90 (64.7)1 4-150
 ⩾857 (63.3)33 (36.7)1.910.89, 4.05
Depression
 <871 (38.0)116 (62.0)1 4-150
 ⩾835 (83.3)7 (16.7)6.152.10, 17.98
MVC (kgF)
>304 (12.9)27 (87.1)1 4-150
 20–3018 (26.5)50 (73.6)1.480.37, 5.93
 10–2050 (57.5)37 (42.5)4.881.18, 20.14
 ⩽1034 (79.1)9 (20.9)8.231.53, 44.38
Activation (%)
>9013 (25.5)38 (74.5)1 4-150
 71–9025 (32.1)53 (67.9)1.070.42, 2.75
 ⩽7068 (68.0)32 (32.0)2.811.01, 7.80
Radiographic score
0–132 (50.8)31 (49.2)1
 2–336 (64.3)20 (35.7)0.790.29, 2.14
 ⩾455 (50.0)55 (50.0)0.870.46, 2.16
  • 4-150 Denotes a significant trend test (p<0.05).