Validity and Reliability of the Vietnamese Version of Chronic Obstructive Pulmonary Disease-Questionnaire for Measuring Knowledge of Chronic Obstructive Pulmonary Disease Patients
Abstract
Objective: The purpose of this study was to translate, and verify the validity and reliability of the Vietnamese version of Chronic Obstructive Pulmonary Disease-Questionnaire (COPD-Q), so as to measure the knowledge level of COPD patients in Vietnam.
Material and Methods: The adaptation and psychometric characteristics test of Vietnamese-COPD-Q was performed, with 90 participants; from July 2021 to February 2022. Our study included 30 COPD patients for pre-testing and adaptation of the translated version; whereas, 60 patients were considered for test-retest reliability. The content validity of the questionnaire was measured by the opinions of five experts. For concurrent validity assessment, Pearson's correlation coefficient was used to test the association between COPD-Q and the COPD assessment test (CAT) scale; the modified British Medical Research Council (mMRC) dyspnea scale. The Kuder-Richardson 20 (KR20) statistical test was used to measure the internal consistency of the questionnaire, while the test-retest reliability was measured using Intra-Class Correlation.
Results: The Vietnamese version of COPD-Q demonstrated good content validity, with the Items content validity index (I-CVI) score for all 13 items >0.79. Negative, significant correlations with mMRC scale (r=-0.859, p-value=0.000), and CAT scale (r=-0.861, p-value=0.000) demonstrated good, concurrent validity. Additionally, internal consistency (KR20 with pre-and post-test as 0.883 and 0.866, respectively) and test–retest reliability (r=0.996, p-value=0.000) was identified with good result.
Conclusion: The knowledge measurement properties of the V-COPD-Q for COPD patients with low health literacy skills were satisfactory.
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