TABLE 2.

Worldwide costs of dementia in 2010, 2015, and 2019 (billion US $), based on World Bank country classification for 2019, inflated to 2019

Basis for prevalence estimates	WAR 20104				WAR 20156				WHO 2019
WB country classification year	2019				2019				2019
	Numbers of people with dementia (millions)	US $ billion	%	Per person with dementia	Numbers of people with dementia (millions)	US $ billion	%	Per person with dementia	Numbers of people with dementia (millions)	US $ billion	%	Per person with dementia
Low-income countriesa	0.6	1.0	0.1	1595	1.1	1.6	0.2	1518	1.4	3.5	0.2	2575
Lower-middle-income countries	6.9	16.2	2.2	2351	8.7	17.0	1.9	1952	8.8	44.3	3.2	5010
Upper-middle-income countries	12.2	113.8	15.4	9347	19.2	162.1	18.1	8444	23.6	293.2	20.8	12,414
Low-and middle-income countriesb	19.7	131.0	17.7	6656	29.0	180.7	20.2	6232	33.8	341.0	24.2	10,083
High-income countries	15.8	608.3	82.3	38,582	17.6	714.6	79.8	40,492	21.4	972.3	75.8	45,500
Allc	35.4	739.3	100.0	20,858	46.6	895.3	100.0	19,210	55.2	1313.4	100.0	23,796

^aSudan is not included in the 2010 and 2015 estimates due to a very high inflation rate. The costs of Sudan correspond to 0.03% of the total costs in 2019.

^bLow- and middle-income countries = low-income countries + lower-middle-income countries + upper-middle-income countries. Note, WB country income classifications are variable over time (i.e., countries are promoted/demoted based on their gross national income).

^cThe countries at each year are not identical, because many small WHO members are included in the 2019 estimates. These countries correspond to 0.02% of the total costs in 2019.

Abbreviations: WAR, World Alzheimer Report; WB, World Bank; WHO, World Health Organization.