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Development and validation of the COugh Assessment Test (COAT)
Hyeon-Kyoung Koo1, Ina Jeong2, Joo-Hee Kim3
1Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Ilsan, Republic of Korea.
Respirology (Carlton, Vic.)
|January 26, 2019
Summary
The COugh Assessment Test (COAT) is a new, simple questionnaire for patients to quantify their cough. It effectively assesses and monitors cough symptoms in clinical practice.
Area of Science:
- Pulmonology
- Clinical Assessment
- Patient-Reported Outcomes
Background:
- Assessing chronic cough impact requires specific quality-of-life tools.
- A simple, quantifiable measure for daily clinical use is needed for cough assessment.
Purpose of the Study:
- To develop and validate a short, patient-completed questionnaire for quantifying cough: the COugh Assessment Test (COAT).
Main Methods:
- Developed the COAT with five items assessing cough frequency, daily activity, sleep, fatigue, and hypersensitivity.
- Validated COAT against the Korean version of Leicester Cough Questionnaire (K-LCQ) and cough numeric rating scale (NRS) in chronic cough patients.
- Utilized reliability testing and Rasch analysis for validation.
Main Results:
- The COAT demonstrated strong test-retest reliability (ICC=0.88).
- COAT showed significant correlations with K-LCQ and cough NRS, both before and after treatment.
- Rasch analysis confirmed COAT fits a unidimensional model.
Conclusions:
- The COAT is a valuable and straightforward tool for assessing and monitoring cough in clinical settings.
- COAT aids in quantifying cough impact, improving patient care.
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