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Table 5 Multivariable analysis of post-operative (12 months) changes in WOMAC domains

From: Factors affecting the quality of life after total knee arthroplasties: a prospective study

WOMAC *
  Pain Function Stiffness
Variables Diff† (95%CI) P-value Diff (95%CI) P-value Diff (95%CI) P-value
Gender (Male vs Female) 0.02 (-0.84, 0.88) 0.2 1.30 (-1.68, 4.28) 0`.4 -0.15 (-0.52, 0.23) 0.4
Age (< 65 vs ≥65) -0.48 (-1.28, 0.31) 0.9 -2.47 (-5.23, 0.28) 0.07 -0.18 (-0.53, 0.17) 0.3
BMI <30 vs ≥30 -0.15 (-0.85, 0.54) 0.6 -0.97 (-3.41, 1.46) 0.4 -0.06 (-0.37, 0.24) 0.4
Education (Low§ vs High) -0.72 (-1.69, 0.44) 0.06 -3.08 (-6.76, 0.59) 0.09 -0.16 (-0.70, 0.28) 0.8
Social Support (Yes vs No) -0.86 (-1.82, 0.09) 0.07 -2.24 (-5.55, 1.06) 0.1 -0.17 (-0.59, 0.25) 0.4
Residence (Rural vs Urban/semi) -0.52 (-1.10, 0.42) 0.05 -2.25 (-4.87, 0.38) 0.09 -0.15 (-0.59, 0.22) 0.06
Pre-intervention Pain 0.10 (2.29, 0.02) 0.02 - - - -
Pre-intervention Function - - 0.17 (0.06, 0.28) 0.002 - -
Pre-intervention Stiffness - - - - 0.07 (-0.02, 0.17) 0.1
  1. * WOMAC scores: pain 0–20, function 0–68, stiffness 0–8; higher scores indicate greater difficulty.
  2. † Estimated differences between categories after adjustment by all other variables.
  3. § Elementary or less; - Not applicable.