Financial protection effects of private health insurance: experimental evidence from Chinese households with resident basic medical insurance

Table 5 Balance test for the quality of propensity score matching in 2017

Variables		Mean		Bias (%)	Bias reduction (%)	T-test
Variables		Treated group	Control group	Bias (%)	Bias reduction (%)	t-value	P>\|t\|
Household size	Unmatched	3.905	3.516	25.9		8.67	0.000
	Matched	3.905	3.934	-2.0	92.5	-0.53	0.599
Inpatient	Unmatched	0.301	0.328	-5.8		-2.08	0.038
	Matched	0.301	0.319	-3.9	33.9	-1.02	0.306
Household members aged < = 5	Unmatched	0.258	0.157	25.2		9.84	0.000
	Matched	0.258	0.248	2.3	90.8	0.57	0.572
Household members aged > = 60	Unmatched	0.376	0.557	-36.9		-13.13	0.000
	Matched	0.377	0.371	1.2	96.8	0.31	0.755
Economic status (CNY)	Unmatched	9.970	9.072	63.7		21.75	0.000
	Matched	9.965	9.921	3.1	95.1	0.93	0.354
Central	Unmatched	0.269	0.312	-9.5		-3.36	0.001
	Matched	0.269	0.238	6.9	27.2	1.91	0.056
West	Unmatched	0.246	0.282	-8.1		-2.86	0.004
	Matched	0.246	0.255	-2.0	75.9	-0.52	0.600
Urban	Unmatched	0.272	0.490	-46.2		-15.83	0.000
	Matched	0.272	0.263	2.0	95.7	0.56	0.579
Gender of household head	Unmatched	0.823	0.846	-6.3		-2.33	0.020
	Matched	0.822	0.822	0.2	97.0	0.05	0.961
Primary school	Unmatched	0.152	0.322	-40.8		-13.28	0.000
	Matched	0.152	0.153	-0.2	99.6	-0.05	0.958
Middle school	Unmatched	0.352	0.364	-2.5		-0.89	0.376
	Matched	0.352	0.331	4.3	-75.3	1.16	0.248
High school and above	Unmatched	0.463	0.220	53.2		20.79	0.000
	Matched	0.462	0.487	-5.5	89.7	-1.33	0.185
Employed	Unmatched	0.801	0.703	22.7		7.74	0.000
	Matched	0.800	0.802	-0.3	98.5	-0.09	0.925
Retired	Unmatched	0.064	0.067	-1.2		-0.42	0.678
	Matched	0.064	0.066	-0.6	50.5	-0.15	0.878
Healthy	Unmatched	0.900	0.769	35.9		11.41	0.000
	Matched	0.900	0.881	5.1	85.8	1.58	0.115

ISSN: 1475-9276