The Change in Vitamin D Levels during the Early Days of Intensive Care Unit Admission and Factors Affecting Change

In the last decade, vitamin D has an increasing importance due to its demonstrated pleotropic, antimicrobial, and immunomodulatory effects, and has been a subject of interest especially in critically ill patients due to its role on immune functions. The aim of this study is to determine whether vitamin D levels change during the first days of intensive care unit (ICU) admission and to study factors that may affect these variations. Patients admitted to the ICU between March 2014 and December 2014 were included in the study.