경도인지장애 노인의 삶의 질 측정을 위한 K-MCQ의 타당도와 신뢰도
Validity and Reliability of K-MCQ to Assess Quality of Life of Older Adults with Mild Cognitive Impairment
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초록
Purpose: The purpose of this study was to validate the Korean version of the mild cognitive impairment questionnaire (K-MCQ) to assess quality of life of older adults with mild cognitive impairment. Methods: The translation and linguistic validation process was completed according to Oxford University’s guidelines and the K-MCQ’s developer. The K-MCQ was expertly reviewed to calculate the content validity index (CVI). After pilot testing, the K-MCQ’s final format was applied to 130 adults with mild cognitive impairment for reliability and validity testing using item analysis, exploratory and confirmatory factor analysis, and internal consistency. The SF-12 is an established quality-of-life instrument that measures criterion validity and the MoCA-K measures concurrent validity. Results: The K-MCQ consisted of 13 items on a 5-point Likert scale and two factors (practical and emotional concerns) explained 67.0% and 72.9%, respectively. The K-MCQ verified discriminant validity in confirmatory factor analysis, criterion validity with a significant correlation with the SF-12 health survey, and concurrent validity with a significant correlation with cognitive function. Reliability was confirmed with Cronbach’s alpha=.92. Conclusion: These findings indicate that the K-MCQ is a reliable and valid measure of quality of life, which can assess quality of life of older Korean adults with mild cognitive impairment.
Abstract
Purpose: The purpose of this study was to validate the Korean version of the mild cognitive impairment questionnaire (K-MCQ) to assess quality of life of older adults with mild cognitive impairment. Methods: The translation and linguistic validation process was completed according to Oxford University’s guidelines and the K-MCQ’s developer. The K-MCQ was expertly reviewed to calculate the content validity index (CVI). After pilot testing, the K-MCQ’s final format was applied to 130 adults with mild cognitive impairment for reliability and validity testing using item analysis, exploratory and confirmatory factor analysis, and internal consistency. The SF-12 is an established quality-of-life instrument that measures criterion validity and the MoCA-K measures concurrent validity. Results: The K-MCQ consisted of 13 items on a 5-point Likert scale and two factors (practical and emotional concerns) explained 67.0% and 72.9%, respectively. The K-MCQ verified discriminant validity in confirmatory factor analysis, criterion validity with a significant correlation with the SF-12 health survey, and concurrent validity with a significant correlation with cognitive function. Reliability was confirmed with Cronbach’s alpha=.92. Conclusion: These findings indicate that the K-MCQ is a reliable and valid measure of quality of life, which can assess quality of life of older Korean adults with mild cognitive impairment.
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