Data from 11,928 adults aged >40 years who completed spirometry in 2010 to 2012 were retrieved from KNHANES. Of these, 302 had chronic cough for more than 3 months (Fig. 1). The overall prevalence of chronic cough in the Korean population aged >40 years was 2.5% ± 0.2%. When compared with people without chronic cough, those with chronic cough were older, male-predominant, and included more current smokers. Hypertension, hyperlipidemia, COPD, diabetes, history of tuberculosis, cardiac disease, asthma, and stroke were more prevalent in subjects with chronic cough. However, the prevalence of chronic laryngitis was not significantly different. The demographic and clinical characteristics of participants are summarized in Table 1.