Point prevalence and epidemiological characteristics of chronic cough in the general adult population: The Korean National Health and Nutrition Examination Survey 2010-2012

Min Gyu Kang, Woo Jung Song, Hyun Jung Kim, Ha Kyeong Won, Kyoung Hee Sohn, Sung Yoon Kang, Eun Jung Jo, Min Hye Kim, Sae Hoon Kim, Sang Heon Kim, Heung Woo Park, Yoon Seok Chang, Byung Jae Lee, Alyn H. Morice, Sang Heon Cho

Research output: Contribution to journalReview article

9 Scopus citations


Cough is frequently self-limiting, but may persist longer in certain individuals. Most of previous studies on the epidemiology of chronic cough have only measured period prevalence, and thus have afforded limited information on the burden and natural course. We aimed to investigate the epidemiology of chronic cough by using a point prevalence measure in a large-scale general population. We analyzed cross-sectional data collected from 18,071 adults who participated in the Korean National Health and Nutrition Examination Survey 2010-2012. Presence and duration of current cough was ascertained by structured questionnaires, and cough was classified into acute (<3 weeks), subacute (3-8 weeks), or chronic cough (≥8 weeks). Demographic and clinical parameters were examined in relation to chronic cough. The point prevalences of acute, subacute, and chronic cough were 2.5±0.2%, 0.8±0.1% and 2.6±0.2%, respectively. The proportion of current cough showed a steep decrease after 1 week of duration. However, 2 peaks in the prevalence of current cough were revealed; cough durations of less than 1 week and longer than 1 year were most common (31.1% and 27.7% of current cough, respectively). Subacute and chronic cough were more prevalent in the elderly (≥65 years); the positive associations with older age were independent of other confounders, including current smoking and comorbidities. This is the first report on the epidemiology of cough using a point prevalence measure in a nationally representative population sample. Our findings indicate a high burden of chronic cough among adults with current cough in the community. The dual-peak of cough duration suggested that the pathophysiology of acute and chronic cough may differ. The preponderance of elderly people in the prevalence of chronic cough warrants further investigation. In addition, more sophistication and validation of tools to define chronic cough will help our understanding of the epidemiology.

Original languageEnglish
Article numbere6486
JournalMedicine (United States)
Issue number13
StatePublished - 1 Jan 2017


  • Adult
  • Chronic cough
  • Epidemiology
  • Point prevalence

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