Table 2.

Item Factor Loadings for Primary Dimension and Scale-specific Sub-domains

Instrument	Item	Description	Primary	EQ-5D	SF-12
EQ-5D	1	Mobility	0.853	0.336	0.000
	2	Self care	0.805	0.382	0.000
	3	Usual activities	0.914	0.264	0.000
	4	Pain	0.813	0.120	0.000
	5	Anxiety/Depression	0.667	−0.095	0.000
SF-12	6	General health	0.731	0.000	0.023
	7	Moderate activities	0.899	0.000	−0.239
	8	Climbing stairs	0.873	0.000	−0.232
	9	Accomplished less (physical)	0.926	0.000	−0.039
	10	Limited (physical)	0.945	0.000	−0.136
	11	Accomplished less (mental)	0.734	0.000	0.613
	12	Limited (mental)	0.720	0.000	0.579
	13	Pain	0.858	0.000	−0.064
	14	Felt calm	0.519	0.000	0.504
	15	Energy	0.691	0.000	0.299
	16	Felt blue	0.461	0.000	0.478
	17	Interference social activities	0.753	0.000	0.303