and 300 healthy controls were enrolled in this casecontrol study. Life-long occupational history, gender, age, exposure to asbestos, comorbidities, and smoking status were collected. Results: The mean age of the 300 lung cancer cases was 60.3 ± 9.9 year (91.7% male and 8.3% female), and the mean age of healthy control group was 60.4 ± 10.5 year (95.0% male and 5.0% female). The most frequent histological types were squamous (172, 57.3%), adeno (69, 23.1%), and small cell (37, 12.3%). There was an increased risk of lung cancer occurrence among agriculture workers (OR=1.89, 95% Cl=1.17−2.98) (p=0.009). Inorganic dust exposure (OR=1.81, 95% Cl=1.0−3.25) (p=0.049) and organic dust exposure (OR=1.89, 95% Cl=1.0−3.59) (p=0.05) were found to be related with high frequency of having lung cancer. Conclusion: Workers who had occupational exposure to organic and inorganic dust, especially in the agricultural field, had higher risk of lung cancer occurrence when compared with office workers. (J Occup Health 2013; 55: 301-306)
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