Sputum production in chronic cough increases the probability of asthma: a cross-sectional questionnaire study

Cough is the most common symptom leading people to seek medical attention and, therefore, its clinical management is of fundamental importance. Management of chronic cough relies on identification and treatment of the background disorder maintaining the cough. Asthma, upper airway cough syndrome (UACS; previously called postnasal drip syndrome or chronic rhinosinusitis) and gastro-oesophageal reflux disease (GORD) are the most common background disorders in chronic cough [1]. Sputum production may suggest asthma as the most probable background disorder maintaining the cough <https://bit.ly/2Qk8aar> We thank Seppo Hartikainen, Istekki Ltd, Kuopio, Finland, for creating the electronic reply form and the data collection system.