Introduction: Obesity is a condition characterized with an increase in size and amount of fat cells in the body. Obesity is caused by imbalance of energy intake (“Diet”) and energy expenditure (“physical activity”). In the present world, there is a major epidemic of Obesity and many obese patients suffer with respiratory symptoms and disease. Obesity can affect the thorax, diaphragm and abdominal muscles, thereby resulting in altered respiratory functions. In this retrospective study, BMI was correlated with COPD (Chronic Obstructive Pulmonary Disease) and the variations in respiratory parameters were noted down. Objectives: (1) Primary objective: To assess the significance between BMI and COPD. (2) Secondary Objective: To propagate the results among the general public about the correlation between Obesity and COPD. Methodology: The pulmonary function test data were randomly selected. This is a retrospective study. The data was obtained from the procedure performed for the diagnosis of patient’s condition. About 60 spirometric values were used for the study (40 subjects with COPD / 20 subjects with normal PFT values). The criteria for COPD diagnosis was airflow limitation irreversible with bronchodilator or only partially reversible with bronchodilator. The best PFT indicator is low FEV1 / FVC ratio below 70% of predicted values. Result: The association between pulmonary function test and BMI was done. There is moderately positive correlation between FEV1 and BMI and similarly between FEV1/ FVC % and BMI. Pearson correlation coefficient analysis was done. P – Value <0.05 was considered to be statistically significant. Conclusion: The purpose of this paper is to determine if there is an association between obesity level and prevalence of COPD. The obesity epidemic poses a new challenge to health professionals caring for patients with chronic respiratory diseases. The impact of obesity on COPD has been much less studied. So there should be an increase in quantity and quality of studies on the association between BMI and COPD in the medical world.

Introduction: Obesity is a condition characterized with an increase in size and amount of fat cells in the body. Obesity is caused by imbalance of energy intake (“Diet”) and energy expenditure (“physical activity”). In the present world, there is a major epidemic of Obesity and many obese patients suffer with respiratory symptoms and disease. Obesity can affect the thorax, diaphragm and abdominal muscles, thereby resulting in altered respiratory functions. In this retrospective study, BMI was correlated with COPD (Chronic Obstructive Pulmonary Disease) and the variations in respiratory parameters were noted down. Objectives: (1) Primary objective: To assess the significance between BMI and COPD. (2) Secondary Objective: To propagate the results among the general public about the correlation between Obesity and COPD. Methodology: The pulmonary function test data were randomly selected. This is a retrospective study. The data was obtained from the procedure performed for the diagnosis of patient’s condition. About 60 spirometric values were used for the study (40 subjects with COPD / 20 subjects with normal PFT values). The criteria for COPD diagnosis was airflow limitation irreversible with bronchodilator or only partially reversible with bronchodilator. The best PFT indicator is low FEV1 / FVC ratio below 70% of predicted values. Result: The association between pulmonary function test and BMI was done. There is moderately positive correlation between FEV1 and BMI and similarly between FEV1/ FVC % and BMI. Pearson correlation coefficient analysis was done. P – Value <0.05 was considered to be statistically significant. Conclusion: The purpose of this paper is to determine if there is an association between obesity level and prevalence of COPD. The obesity epidemic poses a new challenge to health professionals caring for patients with chronic respiratory diseases. The impact of obesity on COPD has been much less studied. So there should be an increase in quantity and quality of studies on the association between BMI and COPD in the medical world.