Chang Ho Chae

Season of sampling and the interpretation of serum homocysteine results: a within-person analysis of 268,877 health-screening examinations

OBJECTIVES: Serum total homocysteine (tHcy) is interpreted against fixed reference intervals and a decision limit. Whether the month of blood collection is a material source of variation, and whether it reflects the seasonal cycle of 25-hydroxyvitamin D [25(OH)D], is unresolved b...