J Korean Ophthalmol Soc.
2023 Nov;64(11):1030-1040. 10.3341/jkos.2023.64.11.1030.
Validation and Reliability of the Cataract-related Visual Function Questionnaire (CVFQ)
- Affiliations
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- 1Department of Ophthalmology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
- 2Department of Ophthalmology , Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- 3Department of Clinical Research Design & Evaluation, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea
- 4Cancer Education Center, Samsung Comprehensive Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- 5Graduate Program in Cognitive Science, Yonsei University, Seoul, Korea
- 6Department of Ophthalmology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
- 7Department of Ophthalmology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
- 8Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
- 9Department of Ophthalmology, Bucheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea
- 10Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
- KMID: 2547866
- DOI: http://doi.org/10.3341/jkos.2023.64.11.1030
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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