Skip to main content

Table 3 Effect sizes from baseline to 6 weeks (n = 22) and relative efficiency

From: The feasibility of implementing the ICHOM Standard Set for Hip and Knee Osteoarthritis: a mixed-methods evaluation in public and private hospital settings

Instrument

Mean changea (95%CI)

p

Effect size

Relative efficiencyb

Relative efficiency rank

Pain - right knee

−2.67 (−4.10 to −1.23)

< 0.01

0.79 (medium)

1.00

1

Pain - left knee

−1.78 (− 2.84 to −0.72)

< 0.01

0.51 (medium)

0.82

2

EQ-5D index

0.23 (0.07 to 0.39)

0.01

0.85 (large)

0.59

3

Pain - lower back

−1.89 (−3.25 to −0.53)

0.01

0.77 (medium)

0.56

4

KOOS physical functionc

−9.87 (−19.19 to −0.55)

0.04

0.74 (medium)

0.35

5

Pain - right hip

−1.17 (−2.83 to 0.50)

0.16

0.39 (small)

0.14

6

EQ-5D VAS

5.53 (−4.52 to 15.57)

0.26

0.26 (small)

0.09

7

Pain - left hip

−0.44 (−1.78 to 0.89)

0.49

0.19 (small)

0.03

8

  1. aMean change = 6-week post-operative score minus baseline score; positive change represents improvement for the EQ-5D index and EQ-5D VAS; negative change represents improvement for pain scores, and KOOS-PS score; p < 0.05 indicates a statistically significant change
  2. bRelative efficiency < 1.00 indicates that the instrument is less efficient than the ‘Pain - right knee’ score in detecting change after joint replacement surgery
  3. cKOOS physical function scores collected from knee participants only; HOOS physical function scores are not reported as too few hip participants completed both baseline and 6 week questionnaires (n = 3)