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Table 8 Knee – patients’ perception of improvement (%) (using the paired data-specific MCID [Eq. 4])

From: Assessing responsiveness of the EQ-5D-3L, the Oxford Hip Score, and the Oxford Knee Score in the NHS patient-reported outcome measures

Instrument Measure Total Much Better A little better About the same A little worse Worse
OKS    (N = 191,379) (N = 138,407) (N = 31,650) (N = 8985) (N = 7029) (N = 4610)
Observed   73% 68% 21% 6% 3% 1%
  AUC 0.7 0.8 0.7 0.7 0.7 0.7
Predicted Pre-op. 58% 74% - - - -
  Pre-op., age, gender, comorbidity 58% 75% - - - -
EQ-5D-3L    (N = 180,546) (N = 130,838) (N = 29,888) (N = 8434) (N = 6569) (N = 4243)
Observed   42% 45% 39% 32% 26% 14%
  AUC 0.9 0.9 0.9 0.8 0.8 0.7
Predicted Pre-op. 44% 46% 46% 35% 8% 5%
  Pre-op., age, gender, comorbidity 44% 44% 45% 36% 14% 5%