Table 2.

Descriptive analysis of economic income level and health gradient

Variable	Income (< 20%)	Income (20% ∼50%)	Income (50% ~ 80%)	Income (> 80%)	Health Gradient
Rural Healthy Residents	22.60%	30.20%	36.66%	40.02%	17.42%
the Median of Annual Total Medical Expenses (CNY)	800	200	60	5	795
Obs	(1177)	(1765)	(1765)	(1177)	-
City Healthy Residents	25.00%	28.58%	29.56%	31.35%	6.35%
the Median of Annual Total Medical Expenses (CNY)	300	100	100	150	200
Obs	(1576)	(2365)	(2365)	(1576)	-
Full Sample Healthy Residents	24.26%	30.14%	32.15%	34.11%	9.85%
the Median of Annual Total Medical Expenses (CNY)	500	100	100	100	400
Obs	(2753)	(4130)	(4130)	(2753)	-