Table 1.

Major aetiologies of chronic cough and bronchiectasis.

Chronic cough	Bronchiectasis
Idiopathic [12–42%] [89]	Idiopathic [7–74%] [28]
Acute/Chronic infection [13–27%] [27]	Post‐infective [10–50%] [28]
Cough variant asthma [10–59%] [13]	Asthma [1%] [90]
Cigarette smoking [22–48%] [15,91]	Immune dysfunction [5%] [90]
Occupational exposure to dust/fumes [7–15%] [15]	Primary Cilliary dyskinesia [3%] [90]
	Allergic bronchopulmonary aspergillosis [3%] [90]
GORD [5–73%] [13]	GORD [1%] [90]
COPD [19–26%] [91,92]	COPD [4%] [90]
Bronchiectasis [2–4%] [15,17]	Cystic fibrosis [1%] [90]
Rhinosinusitis [6–93%] [13]	Rhinosinusitis [27–70%] [93,94]
Sinobronchial disease [17% - Japan] [95]	Sinobronchial disease [25% - Japan] [96]