Vol. 3, Issue 6, Part R (2017)

Abstract
The purpose of this study is to examine the lung capacity between tobacco smokers and non-tobacco smokers. This was a casual comparative study, where the statistical population included 25 tobacco smokers and 25 non-tobacco smokers age between 20 to 25 from pathanamthitta District, Kerala. The parameters measured in spirometer are Lung Volume (LV), Forced vital capacity (FVC), Forced expiratory volume (FEV) at timed intervals of 0.5, 1.0 (FEV1), 2.0, and 3.0 seconds, maximal voluntary ventilation (MVV), also known as Maximum breathing capacity. After the collection of relevant data, to know the difference between tobacco smokers and non-tobacco smokers, the data was collected with the Spiro meter and the t-test was employed and with the help of Statistical technique. The level of significance was set at 0.05. Based on the statistical analysis of data following findings were drawn by the researcher. The result of present study proved that there was significant difference between MVV maximum voluntary ventilation of tobacco smokers and non-tobacco smokers. Further the statistical analysis shows that non- tobacco smokers has more MVV then tobacco smokers. The result of present study proved that there was significant difference between FVC force vital capacity of tobacco smokers and non-tobacco smokers. Further the statistical analysis shows that a non-tobacco smoker has more FVC then tobacco smokers. The result of present study proved that there was significant difference between FVC1 of tobacco smokers and non-tobacco smokers. Further the statistical analysis shows that a non-tobacco smoker has more FVC1 then tobacco smokers. The result of the study proved that was significant difference between PEFR OF tobacco smokers and non-tobacco smokers. These results of the study confirm the findings of Rao et al (1992) who also reported significant difference between tobacco smokers and non-tobacco smokers. The statistical analysis shows that non- tobacco smokers has more PEFR then tobacco smokers.