Table 1.

Relation of Demographic Variables to Trajectories of Change in Cognitive Functions

Fixed effects	Episodic Memory			Semantic Memory			Working Memory			Perceptual Speed			Visuospatial Ability
	Estimate	SE	p	Estimate	SE	p	Estimate	SE	p	Estimate	SE	p	Estimate	SE	p
Time	−0.048	0.006	<0.001	−0.078	0.007	<0.001	−0.048	0.005	<0.001	−0.090	0.006	<0.001	−0.042	0.005	<0.001
Age	−0.034	0.002	<0.001	−0.032	0.003	<0.001	−0.015	0.003	<0.001	−0.040	0.003	<0.001	−0.018	0.003	<0.001
Male gender	−0.185	0.036	<0.001	−0.075	0.040	0.063	−0.017	0.042	0.681	−0.229	0.047	<0.001	0.201	0.044	<0.001
Education	0.046	0.004	<0.001	0.054	0.005	<0.001	0.061	0.005	<0.001	0.082	0.006	<0.001	0.058	0.005	<0.001
Black race	−0.177	0.031	<0.001	−0.348	0.035	<0.001	−0.299	0.036	<0.001	−0.419	0.040	<0.001	−0.595	0.038	<0.001
Age x time	−0.006	0.001	<0.001	−0.006	0.001	<0.001	−0.004	0.001	<0.001	−0.006	0.001	<0.001	−0.003	0.001	<0.001
Gender x time	−0.005	0.009	0.561	0.007	0.010	0.460	0.004	0.007	0.577	0.002	0.008	0.790	0.003	0.006	0.624
Education x time	−0.003	0.001	0.004	−0.004	0.001	0.002	−0.003	0.001	<0.001	−0.003	0.001	0.003	−0.001	0.001	0.064
Race x time	0.010	0.008	0.199	0.021	0.009	0.012	0.004	0.006	0.442	0.040	0.007	<0.001	0.019	0.005	<0.001

Random effects	Variance	Variance	Variance	Variance	Variance
Intercept	0.251	0.303	0.357	0.455	0.381
Slope	0.010	0.012	0.004	0.008	0.002
Error	0.121	0.179	0.162	0.140	0.198

Note. From 5 Separate mixed-effects models. SE, standard error.