Table 2.

Overall Prevalence and Annual Incidence (95% Confidence Interval) of Clinically Diagnosed AD Dementia, by Age and Race

Age, y	CHAP Prevalence			2010 US Population Standardized Prevalence
	AAs	EAs	All Participants	AAs	Non-AAs	All Participants
65-74	9.3 (7.5, 11.0)	2.1 (1.4, 2.8)	5.5 (4.4, 6.6)	11.4 (9.6, 13.2)	3.2 (2.3, 4.1)	3.2 (2.3, 4.1)
75-84	38.2 (35.9, 40.6)	14.9 (13.3, 16.4)	28.1 (26.5, 30.0)	38.4 (36.0, 40.8)	15.4 (13.9, 16.9)	16.3 (14.8, 17.8)
Over 85	78.4 (75.5, 81.3)	49.5 (45.5, 53.5)	69.3 (66.6, 72.0)	78.9 (75.6, 82.3)	47.0 (43.5, 50.5)	52.1 (48.5, 55.9)
All Ages	27.2 (25.6, 28.9)	14.4 (13.2, 15.6)	23.5 (22.6, 24.3)	27.0 (25.4, 28.6)	13.3 (12.3, 14.3)	14.5 (13.7, 15.3)
Age, y	CHAP Annual Incidence			US Population Standardized Annual Incidence
	AAs	EAs	All Participants	AAs	Non-AAs	All Participants
65-74	1.5 (1.0, 2.0)	0.3 (0.1, 0.6)	0.7 (0.4, 1.0)	1.5 (1.0, 2.0)	0.3 (0.1, 0.5)	0.4 (0.1, 0.6)
75-84	5.9 (5.2, 6.7)	3.0 (2.4, 3.4)	4.4 (3.9, 4.8)	6.0 (5.3, 6.7)	2.9 (2.3, 3.4)	3.2 (2.7, 3.7)
Over 85	11.8 (9.5, 14.1)	7.4 (6.1, 8.8)	9.8 (8.4, 11.0)	11.7 (9.2, 14.1)	7.4 (6.0, 8.8)	7.6 (6.9, 9.8)
All Ages	4.1 (3.7, 4.6)	2.6 (2.3, 3.0)	3.6 (3.3, 3.9)	3.9 (3.1, 4.7)	2.1 (1.6, 2.6)	2.3 (1.7, 2.9)