Genetic Risk Score Predicts Late-Life Cognitive Impairment

Table 2

Frequencies of BDNF, COMT, and APOE genotypes and risk allele carriers.

Gene	Genotype		Risk allele carrier status
BDNF	Val/Val	61	Met carriers (risk score value = 1)	34
	Val/Met	33	Val homozygotes (risk score value = 0)	61
	Met/Met	1
COMT	Val/Val	23	Val carriers (risk score value = 1)	63
	Val/Met	40	Met homozygotes (risk score value = 0)	32
	Met/Met	32
APOE	ε2/ε3	12	ε4 carriers (risk score value = 1)	22
	ε2/ε4	1	Non-ε4 carriers (risk score value = 0)	73
	ε3/ε3	61
	ε3/ε4	18
	ε4/ε4	3