Determinants of Vitamin D Levels in Italian Children and Adolescents: A Longitudinal Evaluation of Cholecalciferol Supplementation versus the Improvement of Factors Influencing 25(OH)D Status

Figure 1

Summary of patient flow diagram. Individuals with 25(OH)D deficiency. Patients in the Arm A group received 400 I.U. of vitamin D3 daily during the study, whereas patients in the Arm B group worked to improve factors that influence 25(OH)D status but did not receive vitamin D3 supplements.