Diabetes mellitus is a public health problem in developing and developed world, according to WHO, India will be world diabetic capital in 2025. Diabetes is a complex medical syndrome comprising of heterogeneous group of disease resulting from diverse aetiologies predominantly of genetic and environmental origin. DM affects almost all the organ systems in the body producing biochemical, morphological and functional abnormalities mainly of collagen and elastine . The alterations in these scleroproteins in turn affect the mechanical behaviour of the lungs manifesting in altered lung volumes measured by pulmonary function tests. The alterations in these scleroproteins in turn affect the mechanical behaviour of the lungs manifesting in altered lung volumes measured by pulmonary function tests. People with a higher BMI are more susceptible to diabetes and its complications .High body fat increases insulin resistance in muscles, liver, adipose tissue which increases body insulin production and causes impaired glucose tolerance. The effect of BMI in reducing lung function has been well documented .The present study has focused on correlation of pulmonary function test with BMI in type 2 diabetics.

Diabetes mellitus is a public health problem in developing and developed world, according to WHO, India will be world diabetic capital in 2025. Diabetes is a complex medical syndrome comprising of heterogeneous group of disease resulting from diverse aetiologies predominantly of genetic and environmental origin. DM affects almost all the organ systems in the body producing biochemical, morphological and functional abnormalities mainly of collagen and elastine . The alterations in these scleroproteins in turn affect the mechanical behaviour of the lungs manifesting in altered lung volumes measured by pulmonary function tests. The alterations in these scleroproteins in turn affect the mechanical behaviour of the lungs manifesting in altered lung volumes measured by pulmonary function tests. People with a higher BMI are more susceptible to diabetes and its complications .High body fat increases insulin resistance in muscles, liver, adipose tissue which increases body insulin production and causes impaired glucose tolerance. The effect of BMI in reducing lung function has been well documented .The present study has focused on correlation of pulmonary function test with BMI in type 2 diabetics.