Background/aim: The aim of this study is to evaluate serum 25-hydroxyvitamin D levels measured within one year at an Education and Research Hospital in Turkey to identify vitamin D insufficiency/deficiency (which is very commonly seen in the society) and to provide a current approach to treatment management.
Materials And Methods: This retrospective descriptive study was carried out by examining the data relating to 35,667 individuals.
Results: Of the individuals participating in the study, 94.