. 2021 Mar 15;18(6):3003. doi: 10.3390/ijerph18063003

Table 1.

Number of participants and expenditure on dental care from 2008 to 2017.

	Aged 65 and Older ^b				Income Quintile
	Aged 65 and Older ^b				Lowest Income (1st Quintile)				Highest Income (5th Quintile)
Year	n	Mean ^a	95% CI ^c		n	Mean	95% CI		n	Mean	95% CI
Year	n	Mean ^a	Lower	Upper	n	Mean	Lower	Upper	n	Mean	Lower	Upper
2008	2826	533,419	396,727	670,111	1159	351,243	229,066	473,420	199	543,440	265,229	821,651
2009	2829	457,749	356,623	558,876	1112	340,571	231,185	449,957	218	959,568	243,232	1,675,905
2010	2876	552,945	451,359	654,531	1127	418,162	259,423	576,900	232	674,084	395,857	952,311
2011	2967	538,179	440,376	635,982	1181	457,466	299,049	615,884	201	753,351	331,709	1,174,994
2012	2979	516,566	440,857	592,276	1168	422,420	322,145	522,696	200	520,553	291,492	749,615
2013	3003	515,598	444,563	586,633	1128	393,791	289,891	497,692	206	623,622	405,143	842,100
2014	4061	546,371	454,968	637,774	1665	413,100	333,199	493,001	270	786,488	52,650	1,520,326
2015	4047	571,270	496,892	645,648	1704	487,369	400,756	573,981	277	577,704	405,373	750,035
2016	4052	600,972	526,261	675,684	1620	477,076	395,055	559,097	284	612,729	424,484	800,974
2017	4158	532,489	476,690	588,288	1650	476,449	396,838	556,060	264	383,789	219,802	547,777

^a The dental expenditure unit is KRW. ^b The participants who have had dental visits each year whose average age and standard deviation is 73.4 ± 6.1 year old, with a minimal and maximal range from 65 to 104 years old. ^c CI denotes confidence interval.