10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 3 2012 (July - September) The objective of this study is to determine the correlation between pulmonary function tests by spirometry with body mass index in healthy obese and non obese adults. This study involves 100 medical students (50 males, 50 females) aged 18 to25 yrs (mean age 21.28±2.0 yrs). They were grouped according to BMI as normal weight (18.5–23.9 kg/m2, n=35), overweight (24–29.9 kg/m2, n=30) and obese (≥30 kg/m2, n=35). Subjects underwent spirometry tests, Pulmonary function tests .Parameters were tidal volume(TV), vital capacity(VC), forced expiratory volume in the first second (FEV1 ), forced vital capacity (FVC), FEV1/FVC. We found no significant differences in TV (p value = 0.582), VC (p value = 0.886) FVC (p value = 0.614), FEV1 ( p value = 0.746), FEV1/FVC Ratio (p value = 0.19) between the obese and non-obese subjects. Dr Sheetal Panwar, Dr Manoj Kumar And Dr Jayant Makwana body mass index; lung volumes; obesity; pulmonary function test. 834-838