Table 1

The overall characteristics of the study population

Variables	Total		Socioeconomic deprivation
	Total		First quintile (least)		Second quintile		Third quintile		Fourth quintile		Fifth quintile (most)		P value
	N	%	N	%	N	%	N	%	N	%	N	%	P value
Sex													0.013
Men	4455	59.3	1237	61.0	1271	60.6	837	57.1	663	59.7	447	55.3
Women	3055	40.7	790	39.0	825	39.4	630	42.9	448	40.3	362	44.7
Age (years)													<0.001
40–49	2273	30.3	678	33.4	662	31.6	429	29.2	314	28.3	190	23.5
50–59	2519	33.5	701	34.6	694	33.1	483	32.9	378	34.0	263	32.5
60–69	1773	23.6	440	21.7	486	23.2	356	24.3	267	24.0	224	27.7
70+	945	12.6	208	10.3	254	12.1	199	13.6	152	13.7	132	16.3
Household income													<0.001
First tertile	2898	38.6	686	33.8	750	35.8	622	42.4	453	40.8	387	47.8
Second tertile	1983	26.4	543	26.8	527	25.1	386	26.3	306	27.5	221	27.3
Third tertile	2629	35.0	798	39.4	819	39.1	459	31.3	352	31.7	201	24.8
Types of insurance													<0.001
Self-employed insured or NHI	6767	90.1	1891	93.3	1933	92.2	1287	87.7	970	87.3	686	84.8
Medical aid	743	9.9	136	6.7	163	7.8	180	12.3	141	12.7	123	15.2
Charlson Comorbidity Index													0.172
0	3724	49.6	1032	50.9	1070	51.0	702	47.9	518	46.6	402	49.7
1	2457	32.7	650	32.1	674	32.2	489	33.3	392	35.3	252	31.1
2+	1329	17.7	345	17.0	352	16.8	276	18.8	201	18.1	155	19.2
Disability													0.461
Healthy	6892	91.8	1871	92.3	1939	92.5	1331	90.7	1005	90.5	746	92.2
Severe	158	2.1	43	2.1	39	1.9	35	2.4	25	2.3	16	2.0
Mild	460	6.1	113	5.6	118	5.6	101	6.9	81	7.3	47	5.8
Onset of diabetes complications													0.461
No	537	7.2	139	6.9	166	7.9	100	6.8	82	7.4	50	6.2
Yes	6973	92.8	1888	93.1	1930	92.1	1367	93.2	1029	92.6	759	93.8
Insulin treatment													0.765
No	7067	94.1	1908	94.1	1967	93.8	1381	94.1	1054	94.9	757	93.6
Yes	443	5.9	119	5.9	129	6.2	86	5.9	57	5.1	52	6.4
Hospital classification													<0.001
General hospital	995	13.2	290	14.3	326	15.6	187	12.7	103	9.3	89	11.0
Hospital	407	5.4	96	4.7	113	5.4	61	4.2	88	7.9	49	6.1
Clinic	5597	74.5	1546	76.3	1543	73.6	1115	76.0	829	74.6	564	69.7
Others	511	6.8	95	4.7	114	5.4	104	7.1	91	8.2	107	13.2
Year of onset type 2 diabetes													0.070
2004	1967	26.2	528	26.0	529	25.2	391	26.7	289	26.0	230	28.4
2005	1863	24.8	524	25.9	521	24.9	351	23.9	278	25.0	189	23.4
2006	1195	15.9	309	15.2	372	17.7	226	15.4	170	15.3	118	14.6
2007	564	7.5	173	8.5	156	7.4	113	7.7	72	6.5	50	6.2
2008	801	10.7	188	9.3	197	9.4	184	12.5	126	11.3	106	13.1
2009	444	5.9	120	5.9	120	5.7	82	5.6	71	6.4	51	6.3
2010	268	3.6	75	3.7	75	3.6	54	3.7	39	3.5	25	3.1
2011	280	3.7	75	3.7	88	4.2	41	2.8	51	4.6	25	3.1
2012	128	1.7	35	1.7	38	1.8	25	1.7	15	1.4	15	1.9
Total	7510	100.0	2027	27.0	2096	27.9	1467	19.5	1111	14.8	809	10.8

NHI, National Health Insurance.