Table 1.

Common etiologies of chronic cough based on child age.

Young children (<5 years)	Older children (>5 years)
Infections	Asthma
Gastroesophageal reflux	Infection
Congenital malformation	Post-nasal drip
Asthma	Protracted bacterial bronchitis
Protracted bacterial bronchitis	Passive smoking
Passive smoking & environmental pollution	Bronchiectasis
Foreign body inhalation	Psychogenic cough