Improving the performance of social health insurance system through increasing outpatient expenditure reimbursement ratio: a quasi-experimental evaluation study from rural China

Table 6 DID estimation on patient per capita annual out-of-pocket expenditure

Outcome variable (y)	Baseline (1673 vs. 1673)			Follow-up (1673 vs. 1673)
Outcome variable (y)	Control \( \left({\widehat{\upbeta}}_0\right) \)	Intervention \( \left({\widehat{\upbeta}}_0+\widehat{\gamma}\right) \)	Diff (BL) \( \left(\widehat{\gamma}\right) \)	Control \( \left({\widehat{\upbeta}}_0+{\widehat{\upbeta}}_1\right) \)	Intervention \( \left({\widehat{\upbeta}}_0+{\widehat{\upbeta}}_1+\widehat{\gamma}+\widehat{\updelta}\right) \)	Diff (FU) \( \left(\widehat{\gamma}+\widehat{\updelta}\right) \)	DIFF-IN-DIFF \( \left(\widehat{\updelta}\right) \)
Outpatient	235.9	221.8	−14.1	229.1	205.9	−23.2	−9.1
P			0.452			0.395	0.518
Inpatient	433.6	525.4	91.8	435.4	334.4	− 101	−192.8
P			0.049			0.043	0.027
Total	669.5	747.2	77.7	664.5	540.3	− 124.2	−201.9
P			0.085			0.041	0.022

ISSN: 1475-9276