Table 4

Comparison of ROC method-based MID estimates with overall estimates

ROC method-based estimates,
median (range)
ROC method-based,
number of estimates (study)
Estimates regardless of calculation method,
median (range)
No of estimates—regardless of calculation method, (study)
KOOS-pain 11.8 (4.0 to 18.0)8 (Mills, 201615; Mostafaee, 202139)11.8 (4.0 to 17.0)13 (Mills, 201615; Mostafaee, 202139)
KOOS-activities of daily living 12 (−1.5 to 155)5 (Mills, 201615; Mostafaee, 202139)12.5 (−1.5 to 15.5)7 (Mills, 201615; Mostafaee, 202139)
KOOS-quality of life 6.5 (3.0 to 12.5)6 (Mills, 201615; Mostafaee, 202139)6.5 (3.0 to 12.5)7 (Mills, 201615; Mostafaee, 202139)
KOOS-sports/recreation 17.5 1 (Mostafaee, 202139)17.51 (Mostafaee, 202139)
KOOS-symptoms 12.5 1 (Mostafaee, 202139)12.51 (Mostafaee, 202139)
KOS-ADL 6.4 (2.2 to 10.6)6 (Williams, 201242)6.4 (2.2 to 10.6)6 (Williams, 201242)
LEFS 6.9 (0.6 to 15.6)6 (Williams, 201242)6.9 (0.6 to 15.6)6 (Williams, 201242)
WOMAC-total 7.8 (1.6 to 16.8)8 (Williams, 201242; Hmamouchi, 201238)7.8 (1.6 to 16.8)8 (Williams, 201242; Hmamouchi, 201238)
  • All the estimates are out of 100.

  • The median estimates are shaded in blue.

  • Shaded in green: Estimates of these MID values were based on the ROC method only.

  • .ADL, activity of daily living; KOOS, Knee injury and Osteoarthritis Outcome Score; KOS, Knee Outcome Survey; LEFS, Lower Extremity Functional Scale; MID, minimal important difference; ROC, receiver operating curve; WOMAC, Western Ontario and McMaster Universities Arthritis Index.