Table 1.

Summary of oral health status of older adult populations in the selected countries/regions.

Country/Region	Year of survey	Caries status	Periodontal status—% with pockets	Edentulous rate	Mean number of missing teeth	References
Australia	2017–2019	17.8% of older adults (over 75 years) had untreated caries	–	20.5%	4.8	[15–17]
	2004–2006	DMFT: 23.7 (over 65 years old)	53.4% (over 65 years) 60.8 % (over 75 years)	–	–	[18, 19]
Brazil	2010	DMFT: 27.5	CPI = 4: 3.3%	53.7%	25.3	[20]
China	2015–2016	DMFT > 0: 98% DMFT: 13.3	14.7% had 6+mm pockets	4.5%	9.5	[21]
Hong Kong	2011	47.8% (65–74 years old) had untreated caries DMFT: 16.2	59.2% dentate persons had 4+mm pockets	5.6%	–	[22]
India	2014	50.1% DT: 3.8	79.4%	–	–	[23]
	2007	–	–	65–74 years old: 18.5%	–	[24]
Japan	2016	DMFT: 65–69 years old: 18.8 70–74 years old: 19.6 75–79 years old: 21.2 80–84 years old: 23.3 85+ years old: 24.8	65–74 years old: 57.5% 75+ years old: 50.6%	65–69 years old: 2.4% 70–74 years old: 6.3% 75–79 years old: 7.5% 80–84 years old: 16.1% 85+ years old: 27.2%	–	[25]
Switzerland	2012	–	–	65–74 years old: 6.5% 75–84 years old: 8.6% 85+ years old: 15.1%	65–74 years old: 7 75–84 years old: 9 85+ years old: 12	[26]
	2011	DMFT: 26.8	–	19%	16.5	[27]
	2012	–	95%	52%	–	[28]
Thailand	2017	52.6% of older adults aged 60–74 years had untreated caries DMFT: 15.9 DT = 1.8	24.1% (4–5 mm PD) 12.2% (6 mm PD)	8.7%	13.1	[29]
		43.5% of older adults aged 80–85 years had untreated caries DMFT: 24.0 DT = 1.8	10.6% (4–5 mm PD) 5.9% (6 mm PD)	31%	21.9	[29]
UK	2009	DT 65–74 years old: 0.9 75–84 years old: 1.0 85 + years old: 0.7	Pocket and LoA of 4 mm or more 65–74 years old: 77% 75–84 years old: 82% 85 + years old: 76%	65–74 years old: 15% 75–84 years old: 30% 85 + year old: 47%	–	[30]
US	2015–2018	–	–	12.9%	–	[31]
	2011–2016	16% of the older adults had untreated caries DMFT: 16.7	–	–	–	[32]
	2009–2012	–	62.3% with at least one site ≥5 mm	–	–	[33]