TABLE 1.

Baseline participant characteristics comparing those included versus excluded in analyses

Variables	Included (N=2,114)				Excluded (N=540)				t	χ²	p
Variables	Mean	SD	N	%	Mean	SD	N	%	t	χ²	p
Age, y^a	74.94	6.71			78.63	7.94			10.95		<0.001
Education, y ^a	12.89	2.27			12.19	2.38			−6.38		<0.001
BMI, kg/m²^a	26.75	4.98			25.61	5.05			−4.43		<0.001
3MS score^a	92.01	5.79			85.97	10.16			−17.63		<0.001
APOE										0.04	<0.001
No E4			1,460	70			345	69
1 or more E4			629	30			152	31
Physical activity^a										16.54	0.001
Sedentary			35	2			11	3
Light			549	31			136	40
Moderate			999	56			152	45
Vigorous			187	11			38	12
Depression^a										9.12	0.028
No dep/no meds			1,321	63			359	67
No dep/meds			29	1			13	2
Minor			247	12			45	8
Major			516	24			121	23
Self-reported health^a										60.22	<0.001
Excellent			577	28			86	17
Good			1,217	58			281	56
Fair			274	13			108	22
Poor			29	1			24	5

3MS, Modified Mini-Mental State examination; APOE, apolipoprotein E; BMI, body mass index; depression is coded as follows: No dep/no meds (no depression diagnosis and not on antidepressants); No dep/meds (no depression diagnosis but current taking antidepressants); Minor (diagnosis of minor depressive episode via DSM-III-TR); Major (diagnosis of major depressive episode via DSM-III-TR).

Variables significant at P < 0.05 level for t test/χ² test of independence.