Table 1.

Baseline Demographics and MIS Performance of All Participants (n = 7,547) and Participants Consenting to Centralized Follow-up (n=4,246)

	All Participants (Baseline)	Centralized Follow-up (Baseline)	Centralized Follow-up (Current)
Age	67.5 (5.3)	67.3 (5.2)	73.9 (5.7)
Education	15.0 (2.7)	15.3 (2.4)	15.3 (2.4)
MIS	7.6 (0.7)	7.6 (0.7)	7.4 (1.0)
Race
White	83.8%	86.1%	86.1%
African-American	10.0%	9.8%	9.8%
Other	2.4%	3.0%	3.0%
Unknown	3.8%	1.1%	1.1%
Ethnicity
Hispanic	6.7%	3.0%	3.0%
Family History of Dementia	21.2%	22.0%	22.0%
Years on Study	4.8 (2.1)	5.0 (1.9)	6.6 (1.9)