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Table 3 Minimal important change areas under the curve of the outcome measures, and p values for the PQRS

From: Assessing functional recovery shortly after knee or hip arthroplasty: a comparison of the clinimetric properties of four tools

  Postoperative day 1 to day 2 Postoperative day 1 to week 2 Postoperative day 1 to week 6
  Hip Knee Hip Knee Hip Knee
  Areas under the curve
Timed-Up-and-Go 0.54 (0.37–0.72) (p = .62) 0.50 (0.34–0.67) (p = .96) 0.65 (0.48–0.83) (p = .10) 0.52 (0.35–0.70) (p = .79) 0.68 (0.51–0.85) (p = .05)* 0.51 (0.28–0.73) (p = .96)
Iowa Level of Assistance Scale 0.63 (0.46–0.80) (p = .15) 0.44 (0.29–0.61) (p = .54) 0.61 (0.44–0.79) (p = .22) 0.42 (0.26–0.58) (p = .40) 0.62 (0.45–0.80) (p = .18) 0.44 (0.27–0.61) (p = .61)
Readiness for Hospital Discharge Scale       
global 0.55 (0.37–0.72) (p = .59) 0.68 (0.51–0.84) (p = .03)* - - - -
personal status 0.56 (0.39–0.74) (p = .47) 0.71 (0.55–0.87) (p = .01)* - - - -
knowledge 0.51 (0.33–0.68) (p = .92) 0.63 (0.47–0.79) (p = .12) - - - -
coping 0.57 (0.39–0.74) (p = .46) 0.57 (0.40–0.74) (p = .40) - - - -
support 0.45 (0.28–0.63) (p = .60) 0.50 (0.33–0.66) (p = .95) - - - -
Postoperative Quality of Recovery Scale Chi-square values
Pain p = 1.00 p = 0.49 p = 0.46 p = 0.75 p = 0.06 p = 0.46
Emotion p = 0.05* p = 0.12 p = 0.05* p = 1.00 p = 0.06 p = 0.57
Function p = 1.00 p = 0.67 p = 0.75 p = 0.36 p = 0.11 p = 0.66
Cognition p = 0.66 p = 1.00 p = 0.34 p = 0.34 p = 0.21 p = 0.14
  1. *p < 0.05