Table 2. Distribution of EQ-5D index scores using China, UK, Japan and Korea weights.

Weights	Min	Mean	SD	Median	IQR	Ceiling effect
Overall						93.0%
China	0.249	0.985	0.059	1.000	0.000
UK	-0.264	0.964	0.133	1.000	0.000
Japan	0.134	0.981	0.073	1.000	0.000
Korea	0.138	0.987	0.053	1.000	0.000
Male						94.6%
China	0.249	0.988	0.055	1.000	0.000
UK	-0.264	0.972	0.120	1.000	0.000
Japan	0.134	0.985	0.066	1.000	0.000
Korea	0.195	0.990	0.049	1.000	0.000
Female						91.4%
China	0.292	0.982	0.063	1.000	0.000
UK	0.028	0.957	0.144	1.000	0.000
Japan	0.195	0.977	0.078	1.000	0.000
Korea	0.138	0.984	0.057	1.000	0.000
15–44 yrs						95.4%
China	0.483	0.991	0.045	1.000	0.000
UK	0.028	0.977	0.107	1.000	0.000
Japan	0.430	0.988	0.057	1.000	0.000
Korea	0.482	0.992	0.040	1.000	0.000
45–64 yrs						89.2%
China	0.483	0.979	0.068	1.000	0.000
UK	0.193	0.946	0.158	1.000	0.000
Japan	0.532	0.972	0.084	1.000	0.000
Korea	0.627	0.981	0.057	1.000	0.000
65+ yrs						62.6%
China	0.249	0.905	0.151	1.000	0.153
UK	-0.264	0.795	0.283	1.000	0.473
Japan	0.134	0.885	0.170	1.000	0.232
Korea	0.138	0.916	0.145	1.000	0.137

All means were significantly different between two weights (P < 0.05).