Table 3.

Clinical clues indicating other diagnoses.

Persistent moist cough	Cystic fibrosis, aspiration, immune disorder, ciliary dyskinesia, protracted bacterial bronchitis
Paroxysmal cough	Pertussis or malacia
Cough while feeding	Gastroesophageal reflux disease with or without swallowing problems
Purulent nasal discharge	Sinus infection
Clear nasal discharge	Allergic nose
Abnormal voice or cry	Anatomical cause
Focal sign in chest	Foreign body aspiration
Episodic, seasonal	Asthma
Finger clubbing	Cystic fibrosis, ciliary dyskinesia, immune disorder
Failure to thrive	Immune disorder, cystic fibrosis
Prematurity, low birth weight	Bronchopulmonary dysplasia/chronic lung disease