Table 4.

Means of EQ-5D index and VAS and the differences between proxy-report and self-report groups before and after PSM

Indicators	Before PSM				After PSM
	Proxy-report	Self-report	Difference (95%CI)	P	Proxy-report	Self-report	Difference (95%CI)	P
EQ - 5D indexa	0.929 (0.178)	0.943 (0.132)	−0.014(−0.018,-0.011)	< 0.001	0.946 (0.134)	0.924 (0.183)	−0.022(−0.026,-0.018)	<  0.001
EQ - VAS	81.16 (15.37)	80.43 (12.88)	0.73(0.417,1.043)	< 0.001	81.40 (13.20)	80.50 (15.50)	−0.83(−1.218,-0.450)	<  0.001

^aThe range of EQ-5D is 0–1. In order to express the small difference of EQ-5D index, three decimal numbers is retained