AIMS AND OBJECTIVE :–To study the differences in pulmonary function test values in smokers and non –smokers and their variation from other reported values for smokers by other studies and to study the influence of smoking on pulmonary function.

METHODS AND MATERIAL:–The study population includes 100 subjects. 50 subjects comprised smoker group and 50 subjects for non–smoker group and was carried out in the department of physiology,Hind institute of medical sciences and Hospital, Mau, Ataria, Sitapur, Lucknow by using computerized spirometer.

RESULT: –   The observed value of pulmonary functions in mean± standard deviation, FVC was 3.17 ± 1.05 litres, FEV1 was 2.63 ± 0.97 litres, FEV1% was 84.22±27.22, PEFR was 7.7 ± 1.89 litres/minute, and FEF25–75% was 4.26±0.89 litres. The observed value of pulmonary functions in rural smoker population in mean± standard deviation, FVC was 2.46±0.75 litres, FEV1 was 2.31±0.92 litres, FEV1% was 84.00±22.62, PEFR was 5.65±2.18 litres/minute, and FEF2575% was 3.23±1.27 litres. 

CONCLUSION: –There was significant decrease in pulmonary function in the rural smoker population in comparison to the non–smoker population.