Table 4.

Regression analysis on VAS values, EQ-5D dimensions, aggregated data

	Model 1M1a		Model 1M2b		Model 1M3c
	Estimate	p value	Estimate	p value	Estimate	p value
Intercept	74.12	<0.0001	74.30	<0.0001	75.03	<0.0001
Mobility
Level 2	−4.49	0.0002	−4.53	0.0003	−4.92	<0.0001
Level 3	−5.88	0.0082	−4.77	0.0355	−4.63	0.0301
Self-care
Level 2	−0.78	0.4754	−0.60	0.6025	−0.85	0.3903
Level 3	−6.99	0.0028	−5.54	0.0264	−5.08	0.0397
Usual activities
Level 2	−4.85	0.0001	−5.11	0.0001	−5.50	<0.0001
Level 3	−9.79	<0.0001	−10.58	<0.0001	−11.04	<0.0001
Pain/discomfort
Level 2	−6.36	<0.0001	−5.96	<0.0001	−5.57	<0.0001
Level 3	−9.85	<0.0001	−10.23	<0.0001	−10.76	<0.0001
Anxiety/depression
Level 2	−5.13	<0.0001	−5.48	<0.0001	−5.65	<0.0001
Level 3	−12.39	<0.0001	−12.86	<0.0001	−15.27	<0.0001
Adjusted R2	0.9076		0.9136		0.9308

^aHealth states with less than 20 observations are excluded (number of health states = 51)

^bHealth states with less than 25 observations are excluded (number of health states = 47)

^cHealth states with less than 30 observations are excluded (number of health states = 43)