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

Table 6 Pearson correlations between the RAND-36/12 composite scores

	RAND-36 PCS unweighted	RAND-36 PCS oblique	RAND-12 PCS unweighted	RAND-12 PCS oblique	RAND-36 MCS unweighted	RAND-36 MCS oblique	RAND-12 MCS unweighted	RAND-12 MCS oblique
RAND-36 PCS unweighted	1
RAND-36 PCS oblique	0.99	1
RAND-12 PCS unweighted	0.97	0.96	1
RAND-12 PCS oblique	0.96	0.98	0.98	1
RAND-36 MCS unweighted	0.61	0.71	0.60	0.73	1
RAND-36 MCS oblique	0.68	0.78	0.66	0.79	0.97	1
RAND-12 MCS unweighted	0.59	0.69	0.58	0.72	0.97	0.96	1
RAND-12 MCS oblique	0.66	0.75	0.66	0.79	0.94	0.97	0.97	1

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