Validation of the spanish version of the low vision quality of life questionnaire
Author
Pérez-Maná, Luis
Cardona, Genis
Pardo-Cladellas, Yolanda
Pérez-Mañá, Clara
Amorós-Martínez, Jaume
González Sanchis, Luis
Wolffsohn, James S.
Antón López, Alfonso
Publication date
2021-04-18ISSN
1888-4296
Abstract
Purpose: To validate the Spanish Low Vision Qualify of Life (SLVQOL) questionnaire, a quality of life instrument specifically designed for patients with visual impairment, and evaluate its psychometric properties. Methods: The study included 170 visually impaired patients and 195 healthy subjects. Participants were administered the SLVQOL, the NEI VFQ-25, and the EQ 5D-5L questionnaires. Reliability, test–retest reproducibility, feasibility, and construct validity of the SLVQOL were assessed. The Generalized Partial Credit Model was used to fit the data and the performance of each item was characterized using category response curves and item information. Results: The reliability of the SLVQOL was 0.981 (95% CI: 0.978–0.985). Test–retest reproducibility was good (ρ = 0.864, P < .001). A cut-off point of 105 or 106 was optimal to detect visual impairment, with a sensitivity of 95.4% and a specificity of 91.8%. Construct validity was shown by the corresponding convergence or divergence correlations between the score of the SLVQOL and its dimensions and the overall and partial scores of the NEI VFQ-25 and the EQ 5D-5L. Item response theory analysis showed discrimination and information parameters ranging from 0.539 to 3.063 and from −1.894 to 1.074, respectively. Conclusion: The SLVQOL was able to quantitatively assess and identify differences in the quality of life among patients with visual impairment and normal subjects. The evaluated psychometric properties suggest that this tool has excellent validity, internal consistency, and reproducibility, but may benefit from a reduction of the number of items.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
61 - Medical sciences
617 - Surgery. Orthopaedics. Ophthalmology
Keywords
Qualitat de vida -- Avaluació
Trastorns de la visió
Oftalmologia
Calidad de vida -- Evaluación
Vista -- Defectos
Oftalmología
Quality of life -- Evaluation
Vision disorders
Ophthalmology
Pages
11
Publisher
Elsevier
Is part of
Journal of Optometry
Citation
Pérez-Maná, Luis; Cardona, Genis; Pardo-Cladellas, Yolanda [et al.]. Validation of the spanish version of the low vision quality of life questionnaire. Journal of Optometry, 2021, p. 1-11. Disponible en: <https://www.sciencedirect.com/science/article/pii/S1888429621000200?via%3Dihub>. Fecha de acceso: 10 may. 2021. DOI: 10.1016/j.optom.2021.01.004
This item appears in the following Collection(s)
- Ciències de la Salut [712]
Rights
© 2021 - Spanish General Council of Optometry. Published by Elsevier España, S.L.U. This is an open access article under the CCBY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-nd/4.0/