Normal Chest Radiography Abnormal Chest Radiography UACS (Upper Airway Cough Syndrome) Asthma and Nonasthmatic eosinophilbronchitis ACE Inhibitors Gastroesophageal reflux disease Post-infection Cough Chemical Irritants Psychogenic or Habitual Cough Bronchiectasis Bronchogenic Carcinoma Tuberculosis Sarcoidosis Mediastinal Lymphadenopathy Genetic disease (e.g., cystic fibrosis, primary ciliary dyskinesia, α1-antitrypsin deficiency)

Table 3: Listed are the most common causes of chronic cough, grouped by normal or abnormal chest radiography.