Common risk factors in the development of<unk><unk>  include cigarette smoking, air pollution, genetic factors, increasing age, male gender, allergy, and repeated airway infections.
Chronic bronchitis risk factors
Acute bronchitis risk factors
Bronchiectasis risk factors
Occupational lung disease risk factors
Bronchitis risk factors
Bronchiolitis risk factors
Pneumoconiosis risk factors
Idiopathic pulmonary fibrosis risk factors