The effect of increasing the coinsurance rate on outpatient utilization of healthcare services in South Korea

Lee, Hyo Jung; Jang, Sung-In; Park, Eun-Cheol

doi:10.1186/s12913-017-2076-8

BMC Health Services Research

Table 4 The results of the segmented regression analysis by income

From: The effect of increasing the coinsurance rate on outpatient utilization of healthcare services in South Korea

	Time		2011 policy		Time after 2011 policy
	Estimate	p-value	Estimate	p-value	Estimate	p-value
Low-income*
Percentage of general or tertiary hospital utilization	0.0045	0.4908	−1.1350	<0.0001	−0.0066	0.4063
General or tertiary hospital utilization
Number of outpatient visits	0.0002	0.0156	−0.0067	<0.0001	−0.0001	0.5488
Outpatient medical costs	17.348	0.1097	−2146.8	<0.0001	−38.488	0.0026
Hospital or clinic utilization
Number of outpatient visits	0.0001	0.3191	0.054	<0.0001	−0.0024	<0.0001
Outpatient medical costs	113.3	<0.0001	−516.58	0.0111	−116.55	<0.0001
Middle-income*
Percentage of general or tertiary hospital utilization	0.0008	0.8077	−1.2203	<0.0001	−0.0014	0.7231
General or tertiary hospital utilization
Number of outpatient visits	0.0002	<0.0001	−0.0079	<0.0001	0.0001	0.6918
Outpatient medical costs	12.213	0.0173	−2349.3	<0.0001	−32.848	<0.0001
Hospital or clinic utilization
Number of outpatient visits	0.0002	0.3565	0.0490	<0.0001	−0.0018	<0.0001
Outpatient medical costs	110.11	<0.0001	−980.52	<0.0001	−93.052	<0.0001
High-income*
Percentage of general or tertiary hospital utilization	−0.0163	0.0017	−1.4079	<0.0001	0.0059	0.3481
General or tertiary hospital utilization
Number of outpatient visits	0.0001	0.6515	−0.0070	<0.0001	0.0001	0.8488
Outpatient medical costs	1.4560	0.8684	−2873.7	<0.0001	−40.050	0.0001
Hospital or clinic utilization
Number of outpatient visits	−0.0002	0.5677	0.0576	<0.0001	−0.0013	0.0003
Outpatient medical costs	103.51	<0.0001	−480.34	0.0003	−106.28	<0.0001
Men⁺
Percentage of general or tertiary hospital utilization	−0.0041	0.3630	−1.1856	<0.0001	0.0135	0.0182
General or tertiary hospital utilization
Number of outpatient visits	0.0004	<0.0001	−0.0056	<0.0001	−0.0002	0.0824
Outpatient medical costs	331.91	<0.0001	−2029.9	<0.0001	−441.73	<0.0001
Hospital or clinic utilization
Number of outpatient visits	0.0044	<0.0001	0.0241	<0.0001	−0.0036	<0.0001
Outpatient medical costs	278.33	<0.0001	−306.79	0.0224	−313.60	<0.0001
Women⁺
Percentage of general or tertiary hospital utilization	−0.0110	0.0005	−0.9660	<0.0001	0.0362	<0.0001
General or tertiary hospital utilization
Number of outpatient visits	0.0003	<0.0001	−0.0041	<0.0001	0.0001	0.8235
Outpatient medical costs	358.99	<0.0001	−1220.7	<0.0001	−536.60	<0.0001
Hospital or clinic utilization
Number of outpatient visits	0.0070	<0.0001	0.0311	<0.0001	−0.0096	<0.0001
Outpatient medical costs	352.36	<0.0001	−318.52	0.2383	−507.25	<0.0001

*Adjusted for age, sex, region, CCI, disability, and all cause admission at previous year
⁺Adjusted for age, income, region, CCI, disability, and all cause admission at previous year

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ISSN: 1472-6963

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