Table 1.

Characteristics of the Study Population by Cognitive Status.

	No cognitive impairment		Mild cognitive impairment		Moderate/severe cognitive impairment
Characteristics	n	%	n	%	n	%
Total subjects	7,617		636		1,438
Age categories
50-64	1,269	16.7	24	3.8	34	2.4
65-74	2,014	26.4	91	14.3	163	11.3
75-84	2,725	35.8	244	38.3	465	32.4
85+	1,609	21.1	277	43.6	776	54.0
Sex
Male	3,678	48.3	268	42.1	552	38.4
Female	3,939	51.7	368	57.9	886	61.6
Race
White	6,048	79.4	426	67.0	999	69.5
Black	1,050	13.8	141	22.2	289	20.1
Hispanic	419	5.5	58	9.1	123	8.6
Other	100	1.3	11	1.7	27	1.9
Marital status
Married	3,763	49.4	237	37.3	501	34.8
Not married	3,854	50.6	399	62.7	937	65.2
Years of education
Less than high school	2,774	36.4	397	62.4	772	53.7
High school	2,510	33.0	141	22.2	355	24.7
College	2,333	30.6	98	15.4	311	21.6
Smoke
Never	2,524	33.1	302	47.5	697	48.5
Former	3,826	50.2	276	43.4	651	45.3
Current	1,267	16.6	58	9.1	90	6.3
Alcohol use
None	5,778	76.0	560	88.1	1,307	91.0
Moderate	1,476	19.4	69	10.8	111	7.7
Heavy	344	4.5	7	1.1	18	1.3
Body mass index
Not obese	6,214	81.6	565	88.8	1,275	88.7
Obese	1,403	18.4	71	11.2	163	11.3
Proxy respondent
No	7,444	97.7	433	68.1	420	29.2
Yes	173	2.3	203	31.9	1,018	70.8