Asthma COPD Bronchiectasis
Environmental factors Allergen exposure Smoking Respiratory infections
Occupational sensitizers Occupational exposure Bronchial obstructions
Respiratory infections Pollution Transplantation
Alcoholism
Low socio-economic condition
Host factors Atopy Alpha-1 antitrypsin deficiency Alpha-1 antitrypsin deficiency
Gender Low birth weight Cystic fibrosis
Low birth weight Family history Immunodeficiency
Genetic predisposition Autoimmune disease
Mucociliary dysfunction
Yellow nail syndrome
Congenital diseases (Mounier-Kuhn syndrome, Williams-Campbell syndrome)