ABSTRACT
Introduction: Asthma is a chronic lung disease characterised by reversible airway obstruction, cellular infiltration, and airway inflammation. The reaction is characterised by the interaction of genetic and environmental variables, as well as the activation of cells in the innate and adaptive immune systems. Method: The study was conducted in the Department of General medicine, in Tertiary Care Center, to study association of serum level of Vitamin D3 and pulmonary function in bronchial asthma patients. As per inclusion and exclusion criteria ,137 patients of bronchial asthma were included in the study. Result: In cases having serum vitamin D3 level <20 ng/ml mean value of FVC, FEV1, FEV1/FVC ratio, was 108.10�.89, 68.56�.40, and 62.35�17. In cases having serum vitamin D3 20-29 ng/ml, mean value of FVC, FEV1, and FEV1/FVC ratio was 109.72�.22, 72.34�.48, and 64.39�97. In cases having serum vitamin D3 >30 ng/ml mean value of FVC, FEV1, and FEV1/FVC ratio, was 115.0�27, 81.0�09, and 70.52�00. Conclusion: Vitamin D3 deficiency was highly prevalent in asthmatic patients, there was a strong correlation between asthma severity and vitamin D3 concentrations and there was a direct and a positive significant correlation between vitamin D3 levels and pulmonary function test in asthmatic patients.