The Korean journal of internal medicine

The Korean Association of Internal Medicine (대한내과학회)
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Korean version of the Cough Symptom Score: clinical utility and validity for chronic cough

  • Kwon, Jae-Woo (Department of Internal Medicine, Kangwon National University Hospital) ;
  • Moon, Ji-Yong (Department of Internal Medicine, Hanyang University College of Medicine) ;
  • Kim, Sae-Hoon (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Song, Woo-Jung (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Kim, Min-Hye (Department of Internal Medicine, Ewha Womans University School of Medicine) ;
  • Kang, Min-Gyu (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Lim, Kyung-Hwan (Department of Internal Medicine, The Armed Forces Capital Hospital) ;
  • Lee, So-Hee (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Lee, Sang Min (Department of Internal Medicine, Gachon University Gil Medical Center) ;
  • Lee, Jin Young (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kwon, Hyouk-Soo (Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine) ;
  • Kim, Kyung-Mook (Department of Internal Medicine, Pogunhan Mom Hospital) ;
  • Kim, Sang-Heon (Department of Internal Medicine, Hanyang University College of Medicine) ;
  • Kim, Sang-Hoon (Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine) ;
  • Jeong, Jae-Won (Department of Internal Medicine, Inje University Ilsan Paik Hospital) ;
  • Kim, Cheol-Woo (Department of Internal Medicine, Inha University School of Medicine) ;
  • Cho, Sang-Heon (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Lee, Byung-Jae (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Work Group for Chronic Cough, the Korean Academy of Asthma, Allergy and Clinical Immunology (the Korean Academy of Asthma, Allergy and Clinical Immunology)
  • Received : 2016.04.25
  • Accepted : 2016.12.22
  • Published : 2017.09.01
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Abstract

Background/Aims: The Cough Symptom Score (CSS) is a simple, useful tool for measuring cough severity. However, there is no standard Korean version of the CSS. We developed a Korean version of the CSS and evaluated its clinical utility and validity for assessing chronic cough severity. Methods: The CSS was adapted for Korean use following a forward-backward translation procedure. Patients with chronic cough enrolled from five university hospitals were graded using the CSS and a 100-mm linear visual analog scale (VAS) of cough severity at each visit. Patients completed the Leicester Cough Questionnaire (LCQ) upon presentation and completed the LCQ and Global Rating of Change at follow-up visits after 2 to 4 weeks. The concurrent validity, repeatability, and responsiveness of the Korean version of the CSS were determined. Results: Correlation coefficients between the CSS and LCQ, and between the CSS and VAS, were -0.66 and 0.52, respectively. There was a weak correlation between the scores for night and day symptoms (r = 0.24, p = 0.0006). The repeatability of the CSS in patients with no change in cough (n = 23) was high (intra-class correlation coefficient, 0.75; 95% confidence interval [CI], 0.51 to 0.88). Patients who reported an improvement in cough (n = 30) at follow-up visits had a significant improvement in the CSS (median, -2; 95% CI, -3 to -1; p = 0.0003). Conclusions: The Korean version of the CSS correlated well with other tools for accessing cough severity in chronic cough patients. Therefore, it could be a reliable method for measuring chronic cough severity.

Keywords

References

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