한국판 백내장 설문지의 타당도 및 신뢰도 연구
Validation and Reliability of the Cataract-related Visual Function Questionnaire (CVFQ)
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목적: 백내장 관련 시각기능 평가 설문지(Cataract-related Visual Function Questionnaire, CVFQ)의 신뢰도와 타당도를 평가하였다. 대상과 방법: 본 연구는 2022년 3월부터 6월까지 백내장 환자 141안에 대해 시행한 전향적 단면 연구로 문헌 검토와 전문가 패널의조언으로 작성된 설문지의 구성타당도, 기준타당도, 내적일관성, 검사-재검사 신뢰도를 확인하였다. 결과: CVFQ는 15문항으로 이루어진 전반적인 시력의 질, 전반적인 시기능, 원거리 시기능, 근거리 시기능, 눈부심 관련 시기능의 5개세부 항목으로 구성되어 있다. 타당도 분석을 위해 시행한 탐색적 요인 분석에서 3요인 누적 분산 비율 77.8%였다. 술 전 설문지총점과 최대교정시력, 수술 전후 설문지 총점과 최대교정시력의 차이의 Spearman 상관분석 p값은 각각 0.006, 0.004였다. 신뢰도분석을 위해 시행한 내적일치도의 Cronbach’s alpha 값은 0.9 이상이었고 세부 항목별 검사-재검사 신뢰도 p값은 0.05 미만으로유의하였다. 결론: 본 연구에서 개발된 설문지는 우리나라 백내장 환자의 수술 전후 시력의 질과 시기능을 평가하는 데 있어 활용도가 높을 것으로생각된다.
Abstract
Purpose: To evaluate the reliability and validity of the Cataract-related Visual Function Questionnaire (CVFQ). Methods: A prospective cross-sectional study of 141 cataract patients was conducted from March 2022 to June 2022. The questionnaire was created based on a literature review and advice from an expert panel. This study determined its construct validity, criterion validity, internal consistency, and test-retest reliability. Results: The CVFQ consists of 15 items distributed among five categories: overall visual quality, overall visual function, distance vision, near vision, and glare. In the exploratory factor analysis of validity, the first three principal components explained 77.8% of the variance. The p-values in the Spearman correlation test comparing the pre- and postoperative total CVFQ score and best-corrected visual acuity (BCVA) were 0.006 and 0.004, respectively. In the reliability analysis, Cronbach’s alpha was > 0.9 for internal consistency and the p-values of each subcategory were all significant in the analysis of test-retest reliability. Conclusions: Our results indicate that the CVFQ is useful for measuring the visual quality and visual function of cataract patients in Korea.
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