THE EFFECTS OF CIGARETTE SMOKING ON LUNG FUNCTION OF MALAYSIAN UNIVERSITY STUDENTS
Cross-sectional studies on lung functions of 100 smokers and 100 non-smokers was conducted among a university student population. The objectives of the studies were to determine the correlation between the lung functions with smoking frequency and duration among smokers as well as to compare the lung functions with non-smokers. The smokers' mean age was 20.74 years, their smoking initiation age was 16.18 years, the smoking duration was 4.41 years and the smoking frequency was 8.72 cigarettes per day. Among smokers, significant inverse correlation was shown between FEV1 predicted and the smoking frequency (number of cigarette per day) (r=0.241, p=0.016). Multiple regression confirmed the relationship between FEV1% predicted with respondent's age (p=0.013) and smoking frequency (p=0.002), FVC% predicted with age (p=0.005) and smoking frequency (p=0.009). The FEV1/FVC% predicted was significantly related to phlegm symptoms (p=0.03), while the FEF 25-75% predicted was significantly related to age (p=0.005), height (p=0.043) and smoking duration (p=0.046). The lung functions (FEV1% predicted, FVC% predicted and FEV1/FVC% predicted ) for smokers were not statistically different from non-smokers. This study showed that the lung functions for the smokers were still quite normal due to their short smoking duration, their low number of cigarette smoked per day and their young age.
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