Mean dietary intake and total intakea of folate, vitamin B2, vitamin B6, vitamin B12 and methionine for cases and controls, stratified by ethnicity, 4-Corners Breast Cancer Study, 1999–2004.

Abbreviations: DFE, dietary folate equivalents; SD, standard deviation; mg, milligrams; mcg, microgram; g, gram.aDietary nutrient plus supplement. Supplement use based on participant report of multivitamins and minerals or other supplements.bCase-control comparison within ethnicity.cSignificance test for differences between mean intakes adjusting for age, center, and total energy intake/day on logarithm transferred data.dEthnic group comparison, regardless of case-control status.eHighlighted rows include dietary nutrient plus supplement.fSupplementation not applicable.