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

<p>Abbreviations: DFE, dietary folate equivalents; SD, standard deviation; mg, milligrams; mcg, microgram; g, gram.</p>a<p>Dietary nutrient plus supplement. Supplement use based on participant report of multivitamins and minerals or other supplements.</p>b<p>Case-control comparison within ethnicity.</p>c<p>Significance test for differences between mean intakes adjusting for age, center, and total energy intake/day on logarithm transferred data.</p>d<p>Ethnic group comparison, regardless of case-control status.</p>e<p>Highlighted rows include dietary nutrient plus supplement.</p>f<p>Supplementation not applicable.