Table 4

Correlations between SF-36 scales and rotated components

SF-36 scale^4-151		Factor^4-152		MS (n=398)				US population (n=2474)^4-150
SF-36 scale^4-151		Factor^4-152		PCS	MCS			h²/r_tt^4-153	PCS	MCS	h²/r_tt
PF	P	0.88	0.05	0.82		0.85	0.12	0.78
RP	P	0.69	0.30	0.67		0.81	0.27	0.82
BP	P	0.48	0.31	0.35		0.76	0.28	0.72
GH	P>M	0.59	0.39	0.60		0.69	0.37	0.78
VT	M>P	0.47	0.57	0.67		0.47	0.64	0.75
SF	M	0.60	0.51	0.74		0.42	0.67	0.92
RE	M	0.13	0.81	0.75		0.17	0.78	0.78
MH	M	0.20	0.86	0.91		0.17	0.87	0.92
Eigenvalue		3.78	0.996			>1.0	>1.0
Variance		47.3	12.5			NR^4-154	NR
Total variance^4-160		59.7				81.5

↵4-150 From Ware et al 1994.
↵4-151 Abbreviations in text.
↵4-152 Hypothesised factor content: P=physical factor content; M=mental factor content.
↵4-153 Total reliable variance in each SF-36 scale explained by the two principal components. h²=sum of squared factor loadings for each scale; r_tt=α coefficient for each scale.
↵4-154 Not reported.
↵4-160 Per cent of total reliable variance in all SF-36 scales explained by the two principal components.