A Comparison between Serum 25-Hydroxyvitamin D3 Levels and Serum Ferritin in Children and Adolescents with Iron Deficiency Anemia, Thalassemia Minor, Thalassemia Major and Healthy People.

Background: We aimed to determine the level of serum vitamin D and serum ferritin in four groups' children and adolescents.

Methods: This descriptive/analytical study was conducted in 2019 on children and adolescents with thalassemia aged 7-18 years in Ahvaz, Iran. Overall, 160 patients with the target inclusion and exclusion criteria were assigned into four groups (n=40) of people with thalassemia minor, thalassemia major, iron deficiency anemia and healthy individuals.