Vitamin D Status and its Correlation with Disease Severity among Patients Presented with Major Depressive Disorders in a Tertiary Health Care Hospital in South India

Vitamin D level has a significant inverse correlation with depressive symptoms. The associa- tion of vitamin D level with unipolar or bipolar disorders are inconclusive among Indians. This study was aimed to find the severity of major depressive disorders and their correlation with vitamin D status. A cross-sectional study was conducted among patients (15-65 years old) diagnosed clinically with a major depressive disorder with a known serum 25 (OH) D levels. Mild, moderate, and severe depressive disorders were categorized into groups like vitamin D sufficient (≥75 nmol/L), insufficient (51-74 nmol/L), and deficient (