Table 8.

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

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%