Table 3.

Change in health-related quality of life from baseline to 12 months for knee and hip patients attending GLA:D

	Knee (n: 12 162)				Hip (n: 4093)
	Preperiod QALY (baseline EQ-5D)	3 months EQ-5D*	12 months EQ-5D*	Composite postperiod QALY†	Preperiod QALY (baseline EQ-5D)	3 months EQ-5D*	12 months EQ-5D*	Composite postperiod QALY†
Mean	0.711	0.752	0.756	0.748	0.705	0.733	0.747	0.735
SD	0.113	0.121	0.134	0.107	0.110	0.127	0.144	0.108

*Missing observations for EQ-5D at 3 and 12 months were imputed by Multiple Imputations.

†One-year postperiod QALY was calculated as the area under the curve taking both 3-month and 12-month measurements into account.

EQ-5D, EuroQoL 5-Dimensions 5-Level questionnaire; GLA:D, Good Life with osteoArthritis in Denmark; QALY, Quality-Adjusted Life Year.