TABLE 5.

Cross-classification of quintiles of homocysteine score or individual one-carbon metabolism–related nutrients with the actual plasma homocysteine concentration in men and women from the testing set (n = 404)¹

	Lowest quintile of plasma homocysteine			Highest quintile of plasma homocysteine
	Lowest quintile	Second-lowest quintile	Highest quintile	Highest quintile	Second-highest quintile	Lowest quintile
Homocysteine score	34	29	8	36	23	12
Alcohol intake	48	3	13	23	17	33
Dietary folate intake2	15	18	33	10	16	33
Supplementary folate intake2	19	26	18	19	21	27
Total riboflavin intake2	10	13	33	9	16	26
Total pyridoxin intake2	13	11	28	9	14	32
Total cyanocobalamin intake2	13	16	30	9	14	37
Betaine/choline intake2	11	18	18	12	14	27
Methionine intake2	19	21	15	14	20	20

¹Values are percentages. Fasting plasma homocysteine concentrations were ln-transformed, corrected for batch variation, and adjusted for age, gender, and total calorie intake by the residual method.

²Nutrient values are energy-adjusted intake.