79LUNG FUNCTION IN TYPE 2 DIABETES MELLITUS PATIENTS: ROLE OF GLYCAEMIC CONTROLContext: Type 2 diabetes mellitus is associated with the number of chronic complication. As a result of this, lung function may also be affected. Aims: To study the effects of type 2 diabetes mellitus on lung function and to determine its severity in relation to duration of disease. Setting and design: this was the cross sectional study done on diabetic patient with different duration but the proper glycaemic control. Material and method: Five groups were made depending on the duration of disease, their pulmonary function test was done and it was compared. Result: Significant reduction was seen in the FEV1 (Forced expiratory volume in 1 sec), FVC (forced vital capacity) in diabetic patients with duration more than 5 years. Flow rates i.e. FEF25-75%, PEFR and PIFR also decreased significantly in the diabetic patients with duration more than 10 years. Conclusion: Lung function impairment may occur in type 2 diabetic patients, especially over long duration even if it is controlled. Lung function impairment is suggestive of the restrictive lung disease. It is advisable, therefore, that diabetic patients must undergo periodic spirometry test to assess the severity of lung function impairment. Spirometry will identifymore susceptible diabetic patients so they can take additional preventive measures to prevent the lung damage in initial stagepdho@rediffmail.comResearch452014Diabetes mellitus,FEV1,FVC,PEFRVishal Jamra,Shrikant Ashok SheteAssociate Professor, Department of Preventive and Social Medicine, LNMC and RC, Bhopal, India.,Associate Professor, Department of Physiology, Jhalawar Medical College, Jhalawar-326001, India.