Table 2

The L1 measure of imbalance before and after Coarsened Exact Matching

	OTOC				OTIC				ITIC
	Before		After		Before		After		Before		After
	L1	Mean	L1	Mean	L1	Mean	L1	Mean	L1	Mean	L1	Mean
Sex	0.073	−0.073	1.80E-13	−1.70E-13	0.146	−0.146	1.40E-13	4.40E-14	0.053	0.053	2.00E-13	−1.60E-13
Age 3	0.130	−0.246	1.70E-13	−7.30E-13	0.127	0.284	9.20E-14	6.80E-13	0.288	0.607	9.60E-14	−1.40E-12
Family	0.077	0.126	1.70E-13	−1.10E-12	0.059	−0.027	7.00E-14	1.90E-12	0.138	−0.230	4.10E-14	−5.60E-13
Distance 2	0.065	−0.124	1.40E-13	−2.40E-12	0.057	0.060	6.30E-14	−4.70E-13	0.038	0.075	1.90E-13	5.30E-13
Capacity	0.063	−0.008	8.50E-14	−1.30E-13	0.125	0.087	8.20E-14	−2.40E-13	0.052	−0.047	1.20E-13	−4.20E-13
Traffic	0.127	−0.234	1.00E-13	−1.60E-12	0.031	0.012	7.00E-14	−2.90E-13	0.014	0.025	2.10E-13	3.50E-13
Multivariate L1	0.569		1.38E-13		0.561		2.42E-14		0.512		3.68E-14
N	530 294		267 750		530 294		277 752		530 294		313 360

ITIC, TC patient who used inpatient service in township hospital firstly, then inpatient service in county hospital within 30 days; OTIC, TC patient who used outpatient service in township hospital firstly, then inpatient service in county hospital within 30 days; OTOC, TC patient who used outpatient service in township hospital firstly, then outpatient service in county hospital within 30 days.