Correlated physical and mental health composite scores for the RAND-36 and RAND-12 health surveys: can we keep them simple?

Table 4 Pearson correlations between RAND-36 subscales and unweighted and oblique composite scores

RAND-36 subscales	PCS unweighted	PCS oblique	MCS unweighted	MCS oblique
Physical functioning	0.80	0.77	0.44	0.47
Physical role functioning	0.90	0.88	0.52	0.56
Bodily pain	0.83	0.82	0.49	0.57
General health	0.80	0.82	0.61	0.71
Vitality	0.61	0.72	0.79	0.88
Social functioning	0.60	0.69	0.85	0.80
Emotional role functioning	0.42	0.48	0.82	0.70
Mental health	0.38	0.46	0.82	0.86

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