Table 4.

Decomposition of Trends in Probable Dementia Prevalence, US Adults Aged 70 and Older, 2011-2015

	Prevalence		Coefficient		Decomposition
	2011	2015	2011	2015	Composition effect	Coefficient effect	Total
Age 80−89 (vs. 70−79)	0.330	0.294	0.105	0.104	−0.004	0.000	−0.004
Age 90+ (vs. 70−79)	0.059	0.065	0.266	0.250	0.001	−0.001	0.001
Female	0.580	0.567	0.008	−0.003	0.000	−0.006	−0.006
Black, non-Hispanic (vs. white)	0.079	0.080	0.047	0.019	0.000	−0.002	−0.002
Hispanic/Other	0.112	0.134	0.040	0.065	0.001	0.003	0.004
High school	0.296	0.301	−0.050	−0.054	0.000	−0.001	−0.002
Some college	0.247	0.253	−0.092	−0.087	−0.001	0.001	0.001
College graduate	0.218	0.261	−0.092	−0.085	−0.004	0.002	−0.002
1 vs. 0 risk factors	0.349	0.319	−0.010	0.008	0.000	0.006	0.006
2 vs. 0	0.242	0.264	0.013	0.028	0.000	0.004	0.004
3+ vs. 0	0.210	0.221	0.042	0.079	0.001	0.008	0.009
Constant	1.000	1.000	0.092	0.076	0.000	−0.015	−0.015
Total					−0.005	−0.002	−0.007
% of change					66.7%	33.3%
p-value					0.010	0.716