Health and Quality of Life Outcomes

Table 4 Item-scale correlation matrix for the eight SF-12v2 scales and summary measures*

From: The 12-item medical outcomes study short form health survey version 2.0 (SF-12v2): a population-based validation study from Tehran, Iran

	PF	RP	BP	GH	SF	RE	VT	MH	PCS	MCS
PF
PF1	0.93	0.59	0.53	0.48	0.37	0.35	0.35	0.26	0.80	0.13
PF2	0.94	0.59	0.54	0.50	0.37	0.36	0.39	0.29	0.81	0.16
RP
RP1	0.57	0.94	0.54	0.46	0.43	0.55	0.38	0.31	0.69	0.33
RP2	0.62	0.94	0.59	0.49	0.45	0.53	0.39	0.33	0.74	0.32
BP
BP1	0.57	0.60	1.00	0.56	0.48	0.46	0.46	0.42	0.75	0.36
GH
GH1	0.51	0.49	0.55	0.98	0.40	0.39	0.50	0.44	0.66	0.40
SF
SF1	0.40	0.46	0.48	0.41	1.00	0.48	0.37	0.46	0.39	0.63
RE
RE1	0.36	0.55	0.42	0.38	0.45	0.94	0.34	0.50	0.28.	0.71
RE2	0.35	0.53	0.44	0.38	0.46	0.94	0.35	0.49	0.27	0.71
VT
VT1	0.39	0.41	0.46	0.50	0.37	0.37	1.00	0.49	0.43	0.58
MH
MH1	0.24	0.28	0.37	0.41	0.37	0.39	0.51	0.83	0.16	0.71
MH2	0.25	0.30	0.34	0.35	0.43	0.50	0.33	0.85	0.11	0.74

* Figures are Spearman's correlation coefficient (rho). All correlations were significant at the 0.01 levels. Correlation values of 0.4 or above were considered satisfactory (correlations ≥ 0.81-1.0 as excellent, 0.61-0.80 very good, 0.41-0.60 good, 0.21-0.40 fair, and 0-0.20 poor) [25].

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