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Table 5 Model Parameter Estimates for the WOMAC Physical Function Subscale

From: Modeling early recovery of physical function following hip and knee arthroplasty

  Parameter WOMAC PF Estimate (95% CI) Level of Significance
Fixed Effect Estimates Intercept (mean score at 1 week) 23.92 (19.21, 28.63) p < .0005
  Slope (weeks after surgery) -3.62 (-4.17, -3.06) p < .0005
  Quadratic (weeks)2 .140 (.100, .181) p < .0005
  WOMAC Physical Function Baseline Score .319 (.185, .452) p < .0005
   Standard Deviation
Variance Estimates Within Patient Residual 7.68
  Intercept 7.48
  1. Abbreviations: CI, Confidence Interval
  2. PF, Physical Function
  3. TKA, Total Knee Arthroplasty
  4. THA, Total Hip Arthroplasty