Definition of vitamin B12 and folate status
Plasma cobalamin, t-Hcy, and MMA concentrations were used to describe vitamin B12 status. cB12 status was calculated as the log of (cobalamin/t-Hcy×MMA) multiplied by a constant while adjusting for folate concentration and age [Cutoffs used to assess vitamin B12 and folate statusAbbreviations: cB12, combined indicator for vitamin B12 status based on the concentrations of t-Hcy, MMA, and cobalamin; MMA, methylmalonic acid; t-Hcy, total homocysteine.