Decomposition analysis on the equity of health examination utilization for the middle-aged and elderly people in China: based on longitudinal CHARLS data from 2011 to 2018

Table 3 Concentration index and horizontal equity in the health examination service utilization among the elderly from 2011 to 2018

Time	Total (n = 11,496)				Rural (n = 9,457)				Urban (n = 2,039)
	CI	95% CI		HI	CI	95% CI		HI	CI	95% CI		HI
	CI	Lower	Upper	HI	CI	Lower	Upper	HI	CI	Lower	Upper	HI
2011	0.0080	− 0.0084	0.0244	0.0130	− 0.0060	− 0.0246	0.0125	− 0.0010	0.0027	− 0.0319	0.0374	0.0077
2013	0.0155	− 0.0054	0.0363	0.0467	− 0.0135	− 0.0377	0.0107	0.0177	− 0.0036	− 0.0437	0.0366	0.0276
2015	0.0095	− 0.0088	0.0277	0.0385	− 0.0236	− 0.0447	− 0.0025	0.0054	0.0170	− 0.0184	0.0524	0.0460
2018	− 0.0100	− 0.0254	0.0054	0.0254	− 0.0352	− 0.0525	− 0.0178	0.0002	0.0546	0.0209	0.0883	0.0900

CI Concentration index, 95%CI 95% confidence interval, HI Horizontal inequity index.

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