Table 1.

Characteristics of the study participants (n=8,773)

Variable	Overall sample (n=8,773)	Derivation sample (n=4,386)	Validation sample (n=4,387)
Age, mean (SD)	76.0 (7.2)	75.7 (7.1)	76.2 (7.2)
Female sex, n (%)	5,043 (57.5)	2,503 (57.1)	2,540 (57.9)
Years of education, mean (SD)	16.0 (3.0)	16.0 (3.0)	16.0 (2.9)
Ethnicity, n (%)
White	7,202 (82.1)	3,599 (82.1)	3,603 (82.1)
African American	1,063 (12.1)	538 (12.3)	525 (12.0)
Others/Unknown	508 (5.8)	249 (5.7)	259 (5.9)
MoCA total score, mean (SD)	22.5 (6.1)	22.5 (6.1)	22.5 (6.0)
Diagnosis, n (%)
Dementia	2,042 (23.3)	1,005 (22.9)	1,037 (23.6)
Mild cognitive impairment	1,845 (21.0)	942 (21.5)	903 (20.6)
Normal cognition	4,886 (55.7)	2,439 (55.6)	2,447 (55.8)

SD, standard deviation; MoCA, Monteral Cognitive Assessment.