Table 4

Association between the variables and health insurance status

		Number of outpatient visits		p Value	Number of hospitalisations		p Value	Hospital days		p Value
	N	Mean*	SD†	p Value	Mean*	SD†	p Value	Mean*	SD†	p Value
Health insurance status change				<0.0001			<0.0001			<0.0001
Continuous health insurance	66 750	15.04	27.09		0.16	0.61		2.82	16.65
Newly Medical Aid	485	29.08	44.57		0.42	1.18		9.59	32.53
Newly health insurance	650	23.54	38.26		0.21	0.69		6.14	26.32
Continuous Medical Aid	4408	32.45	45.00		0.35	1.04		8.21	34.07
Gender				<0.0001			<0.0001			<0.0001
Male	32 616	11.70	22.77		0.17	0.66		3.57	21.00
Female	39 677	20.04	32.93		0.18	0.65		2.94	16.14
Age, years				<0.0001			<0.0001			<0.0001
20–29	8191	4.42	9.27		0.09	0.48		0.87	7.00
30–39	12 649	5.95	12.90		0.12	0.50		1.29	12.23
40–49	12 945	8.09	17.34		0.11	0.52		1.89	15.59
50–59	10 574	14.43	23.97		0.16	0.64		2.85	16.35
60–69	11 745	24.60	34.21		0.21	0.73		4.56	22.26
≥70	16 189	32.05	40.40		0.30	0.84		6.28	25.28
Residential region				<0.0001			<0.0001			<0.0001
Urban	31 389	14.24	26.51		0.16	0.61		2.92	19.51
Rural	40 904	17.84	30.84		0.19	0.69		3.46	17.67
Marital status				0.0266			<0.0001			0.0001
Married	47 013	14.96	26.28		0.18	0.65		3.04	17.73
Single (including divorced, widowed, separation)	25 280	18.72	33.57		0.17	0.66		3.57	19.82
Education level				<0.0001			<0.0001			<0.0001
≤Elementary	22 862	30.29	39.57		0.27	0.83		5.81	25.04
Middle school	8244	17.50	27.89		0.18	0.65		3.24	18.17
High school	20 804	9.98	19.88		0.14	0.51		2.27	14.73
≥College	20 383	6.48	13.05		0.11	0.54		1.30	11.92
Number of household members				<0.0001			<0.0001			<0.0001
1–2	29 161	25.27	36.38		0.25	0.80		5.03	23.58
3–4	34 413	9.92	20.19		0.12	0.51		2.00	14.00
≥5	8719	11.28	22.94		0.12	0.56		2.01	13.51
Scale of chronic disease				<0.0001			<0.0001			<0.0001
Increase	8657	18.75	25.91		0.23	0.65		3.99	18.07
Decrease	6261	10.06	19.25		0.14	0.50		2.66	18.32
Constant	57 375	16.58	30.32		0.17	0.67		3.17	18.56
Perceived health status				<0.0001			<0.0001			<0.0001
Good	40 272	6.70	12.91		0.08	0.33		0.83	7.15
Average	14 388	19.01	26.23		0.14	0.44		2.05	11.29
Bad	17 633	35.92	43.89		0.43	1.12		9.65	33.55
Economic activity status				<0.0001			<0.0001			<0.0001
Yes	35 127	21.80	34.38		0.25	0.84		5.20	24.71
No (including housewife and students)	37 166	11.06	21.76		0.10	0.39		1.36	8.99
Disability				<0.0001			<0.0001			<0.0001
Yes	7582	27.63	39.73		0.37	0.97		10.11	37.34
No	64 711	14.95	27.27		0.15	0.60		2.42	14.57
Year				<0.0001			<0.0001			<0.0001
2007	12 992	16.52	30.20		0.16	0.69		2.96	18.80
2008	12 487	15.41	27.10		0.18	0.68		3.40	21.18
2009	12 241	15.48	28.31		0.19	0.69		3.74	20.81
2010	11 867	16.32	29.41		0.17	0.61		3.45	18.40
2011	11 350	16.87	29.74		0.17	0.63		2.75	14.75
2012	11 356	17.17	29.71		0.18	0.61		3.03	15.51

*Weighted mean.
†Weighted SD.