Table 1.

Baseline characteristics of study population

	Treatment Group*
	A n=42	B n=34	C n=34	D n=32
Mean Age (y)	40.9	39.1	43.1	44.4
Gender (% male)	45.2	47.1	44.1	40.6
Mean Baseline Serum Folate (ng/mL)	13.3	13.8	14.3	13.9
Mean Baseline RBC Folate (ng/mL)	515	562	520	517
% 677TT Genotype	14.3	23.5	17.6	9.4
% African-American	16.7	20.5	5.9	18.8

^*A=0 and 200 μg/day, B=200 and 0 μg/day, C=200 and 400 μg/day, D=400 and 200 μg/day