Low Vitamin D Levels Are Associated with Both Iron Deficiency and Anemia in Children and Adolescents

Background: We aimed to examine the association between vitamin D deficiency and anemia in a nationally representative sample of Korean children and adolescents. Methods: Cross-sectional data on 2526 children and adolescents aged 10–20 years from the Korea National Health and Nutrition Examination Survey-V (2010–2012) were used. Anemia was defined according to specifications of the World Health Organization. Iron deficiency was defined as serum...