| |
Cough-variant asthma |
Atopic cough |
Eosinophilic bronchitis without asthma |
| Pathologic findings Eosinophilic inflammation |
Central to peripheral airways |
Central airway |
Central airway peripheral airway |
| Physiologic findings |
Slightly increased tonus of bronchial smooth muscle and bronchoconstriction due to mild airway hyperresponsiveness |
Normal airway responsiveness Increased cough receptor sensitivity |
Normal airway responsiveness Increased cough receptor sensitivity |
| Mechanism of cough |
Mediated by bronchoconstriction |
Due to increased cough receptor sensitivity |
Probably due to increased cough receptor sensitivity |
| Presence of cough required for diagnosis |
Yes |
Yes |
No |
