Table 1.

Reliability and correlation of the SF-36 dimensions.

		Reliability				Correlation
Dimension	Item amount	Split-half reliability	Test-retest difference mean	ICC	Cronbach's α	Correlations between dimensions and items inside	Correlations between dimensions and items outside	PCS	MCS
PF	10	0.909	0.153†	0.964	0.862	0.257–0.922	0.164–0.564	0.756	0.340
RP	4	0.974	-1.020†	0.735	0.950	0.869–0.905	0.108–0.655	0.634	0.425
BP	2	0.904	-1.224†	0.817	0.863	0.837–0.976	0.063–0.363	0.656	0.177
GH	5	0.593	0.010†	0.952	0.818	0.716–0.785	0.123–0.624	0.756	0.517
VT	4	0.927	-0.867*	0.972	0.785	0.644–0.868	0.155–0.624	0.533	0.690
SF	2	0.368	-0.225†	0.689	0.308	0.662–0.687	0.067–0.322	0.326	0.508
RE	3	0.967	0.000†	0.898	0.951	0.877–0.952	0.080–0.614	0.351	0.599
MH	5	0.647	-0.204†	0.817	0.691	0.596–0.801	0.095–0.579	0.266	0.877

* P-value = 0.034, † P-value > 0.05