Introduction: - Chronic Obstructive Pulmonary Disease (COPD) is a common, preventable and treatable disease which is a leading cause of
mortality and morbidity worldwide. Smoking and biomass fuel exposure plays a major role in copd by oxidative stress which leads to decrease in
predicted FEV1% and FEV1/FVC ratio. Comparison in decline in lung function between smokers, ex-smokers and non-smokers.Objective:-
Material And Methods: - This was a hospital-based case control study conducted at Institute of Respiratory Diseases SMS Medical College
Jaipur, Rajasthan India. Total 50 healthy controls and 50 Smokers and Ex-Smokers Diagnosed cases of COPD enrolled in study during2020-2021.
Results: - FEV1% in cases was 55.86 ± 15.9 and in controls was 89.2 ± 6.65. FEV1/FVC in cases was 56.62 ± 10.15 and in controls was 76.98 ±
3.61. Predicted FEV 1% and FEV1/FVC ratio was low in cases as compare to controls and the levels were also low in Smokers asConclusion: -
compare to Ex-Smokers.