From: Modeling early recovery of physical function following hip and knee arthroplasty
Measure | Average Recovery Model (Fixed Effects) | Individual Variations in Recovery (Random Effects) |
---|---|---|
Six Minute Walk test (6 MWT) | intercept (one week status), slope (rate of change at 1 week), quadratic term (weeks2) Predictors: preoperative 6 MWT baseline score, gender; site of arthroplasty Interactions: site of arthroplasty with rate of change at 1 week, baseline score with rate of change at 1 week | intercept |
Timed Up and Go Test (TUG) | intercept, slope, quadratic term Predictors: preoperative TUG baseline score, gender, site of arthroplasty, additional outpatient treatment Interactions: site of arthroplasty with rate of change at 1 week | intercept |
Timed Stair Test (ST) | intercept, slope, quadratic term Predictors: preoperative ST baseline score, gender, site of arthroplasty, additional outpatient treatment Interaction s: site of arthroplasty with rate of change at 1 week | intercept |
WOMAC Physical Function (PF) Subscale | intercept, slope, quadratic term Predictors: preoperative WOMAC PF baseline score | intercept |
Lower Extremity Function Scale | intercept, slope, quadratic term Predictors: preoperative LEFS baseline score, gender | intercept, slope |