Development and validation of the COugh Assessment Test (COAT)
- Authors
- Koo, Hyeon-Kyoung; Jeong, Ina; Kim, Joo-Hee; Kim, Sung-Kyoung; Shin, Jong-Wook; Park, So Young; Rhee, Chin Kook; Choi, Eun Young; Moon, Ji-Yong; Kim, Yee Hyung; Lee, Hyun; Kang, Hye Seon; Min, Kyung Hoon; Kim, Jin Woo; Kim, Je Hyeong; Lee, Sang Haak; Yoo, Kwang Ha; Kim, Deog Kyeom; Yoon, Hyoung Kyu; Kim, Dong-Gyu; Kim, Hui Jung; Jung, Ki-Suck; Jang, Seung Hun
- Issue Date
- 6월-2019
- Publisher
- WILEY
- Keywords
- cough; questionnaire; reliability; severity; validity
- Citation
- RESPIROLOGY, v.24, no.6, pp.551 - 557
- Indexed
- SCIE
SCOPUS
- Journal Title
- RESPIROLOGY
- Volume
- 24
- Number
- 6
- Start Page
- 551
- End Page
- 557
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/64835
- DOI
- 10.1111/resp.13462
- ISSN
- 1323-7799
- Abstract
- Background and objective A cough-specific quality-of-life questionnaire is recommended to assess the impact of cough; however, a simple instrument to quantify cough is required for everyday clinical practice. This study was aimed to develop a short patient-completed questionnaire (COugh Assessment Test, COAT). Methods The COAT was developed and validated by comparison with the Korean version of Leicester Cough Questionnaire (K-LCQ) and cough numeric rating scale (NRS, 0-10, 11-point scale) for chronic cough patients. Results Item selection identified five items regarding cough frequency, daily activity, sleep disturbance, fatigue and cough hypersensitivity (0-4 scaling of items, 0-20 score range) through reliability test cohort (n = 78). Test-retest reliability was strong (intra-class correlation coefficient = 0.88). The final COAT was compared with K-LCQ and cough NRS in a validation cohort (n = 323). In Rasch analysis, COAT fitted well to a unidimensional model. Pearson correlations of COAT versus K-LCQ (i) before treatment, (ii) after treatment; COAT versus cough NRS (iii) before treatment, (iv) after treatment; (v) delta-COAT versus delta-cough NRS, (vi) delta-COAT versus delta-K-LCQ were (i) -0.71, (ii) -0.81, (iii) 0.69, (iv) 0.82, (v) -0.66 and (vi) 0.72, respectively. Conclusion The COAT is a useful, simple questionnaire for assessing and monitoring cough.
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