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Table 4 Regression analysesa of association between tissue abnormalities detected by CR and/or MRI and biomechanical factors

From: Biomechanical factors and physical examination findings in osteoarthritis of the knee: associations with tissue abnormalities assessed by conventional radiography and high-resolution 3.0 Tesla magnetic resonance imaging

   Quadriceps strength (Nm/kg) Hamstrings strength (Nm/kg) Proprioceptive accuracy (degrees) Varus-valgus laxity (degrees)
Conventional radiography    
JSWb MTF -0.12 (0.16) 0.02 (0.84) -0.03 (0.78) -0.22 (0.02)
  LTF -0.07 (0.37) -0.03 (0.71) -0.08 (0.42) 0.26 (<0.01)
  PF -0.18 (0.03) 0.09 (0.28) -0.03 (0.80) -0.14 (0.13)
Osteophyteb MTF -0.03 (0.69) 0.04 (0.66) -0.10 (0.31) 0.07 (0.47)
  LTF -0.06 (0.51) 0.06 (0.46) -0.05 (0.63) 0.26 (<0.01)
  PF -0.09 (0.30) 0.06 (0.44) -0.09 (0.38) -0.08 (0.37)
Magnetic resonance imaging    
Cartilage integrity MTF -0.15 (0.07) 0.00 (0.97) 0.11 (0.25) -0.22 (0.02)
  LTF -0.05 (0.55) 0.09 (0.30) 0.05 (0.61) 0.07 (0.44)
  PF -0.17 (0.04) 0.10 (0.24) -0.02 (0.86) -0.11 (0.23)
Osteophytes MTF -0.05 (0.56) 0.11 (0.18) 0.08 (0.43) -0.08 (0.36)
  LTF -0.08 (0.33) 0.05 (0.58) 0.02 (0.88) 0.02 (0.87)
  PF -0.12 (0.15) -0.01 (0.95) -0.03 (0.77) -0.17 (0.06)
BML MTF 0.03 (0.76) 0.12 (0.13) 0.16 (0.11) -0.06 (0.48)
  LTF -0.05 (0.54) 0.12 (0.13) -0.05 (0.62) 0.12 (0.18)
  PF 0.01 (0.91) 0.16 (0.06) -0.17 (0.08) -0.12 (0.19)
Effusionc   -0.16 (0.05) -0.08 (0.34) 0.11 (0.26) 0.08 (0.40)
Synovitisd   -0.21 (0.01) -0.11 (0.17) 0.03 (0.76) -0.02 (0.83)
  1. Data presented as standardized regression coefficient β (P value). Significant associations (P <0.05) in bold. BML, bone marrow lesion; CR, conventional radiography; JSW, joint space width; LTF, lateral tibiofemoral compartment; MRI, magnetic resonance imaging; MTF, medial tibiofemoral compartment; PF: patellafemoral compartment. aAdjusted for age, gender and duration of knee symptoms. bDefinite/severe abnormality compared with none/mild abnormality (reference group). cMedium/large effusion compared with no/small effusion (reference group). dPresence of synovitis in at least one region compared with absence of synovitis (reference group).