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This article aims to measure the obstructive and restrictive patterns of lung function of 506 consented workers aged between 18-60 years and having at least one year work experience at brick kilns. Questionnaire was filled by workers and also lung functions were measured by using a spirometer. It was observed that 81% workers had abnormal lung function with 33% obstructive and 67% restrictive impairments. Further severe obstructive impairment was seen in 56% workers, 41% having moderate obstructive impairment and only 3% with m