Risk Factors for Variation in 25-Hydroxyvitamin D3 and D2 Concentrations and Vitamin D Deficiency in Children

Abstract

Vitamin D deficiency was common in this contemporary U.K. cohort. Despite some overlap, there are differences in potential confounding structures for associations of 25(OH)D₃ and 25(OH)D₂ with health outcomes. These should be accounted for in future studies.