Journal of AdvancedMedical and Dental Sciences Research

Background:Smoking is known to have a significant negative impact on respiratory functioning and is a known contributing factor to the development of certain respiratory illnesses. The present study was conducted to assess pulmonary function parameters among smokers. Materials & Methods:120 subjects of both genderswere divided into 3 groups viz, smokers, ex-smokers and non-smokers. First group included the subjects who were currently smoking and have smoked at least 5 pack-years. Second group included those who had smoked at least 5 pack years in the past and have quit smoking minimum one year before this study.Third group consisted of those who did not smoke at all.The parameters of PFT studied, included Forced Vital Capacity (FVC), Forced Expiratory Volume in first second (FEV1), Forced Expiratory Flow (FEF25-75%) and Peak Expiratory Flow Rate (PEFR), and Maximal Voluntary Ventilation (MVV). Results: Out of 120 subjects, males were 75 and females were 45. The mean age (years) was 45.2, 47.4, and 48.0. The mean height (cm) was 163.5, 165.4 and 164.2. The mean weight (kgs) was 64.5, 64.7 and 68.1. The mean BMI was 23.5 kgs/m2, 23.6 kgs/m2, and 26.2 kgs/m2 in groups I, II, and III respectively. The difference was significant (P< 0.05). The mean FVC (ltrs) was 1.4, 2.3 and 3.6, FEV1 (ltrs) was 1.7, 2.5 and 3.2, FEF 25-75% (ltrs/min) was 2.4, 3.2 and 4.8, MVV (ltrs/min) was 91.4, 90.5 and 117.3 and PEFR (ltrs/min) was 5.2, 6.3 and 7.6 in group I, group II and group III respectively. Conclusion: Smoking causes a significant decline in lung function and that quitting smoking can lead to signs of recovery.