Please use this identifier to cite or link to this item: https://doi.org/10.1186/s12955-017-0726-5
Title: Development of a new Rasch-based scoring algorithm for the National Eye Institute Visual Functioning Questionnaire to improve its interpretability
Authors: Petrillo, J
Bressler, N.M
Lamoureux, E 
Ferreira, A
Cano, S
Keywords: vasculotropin
adult
age related macular degeneration
aged
algorithm
Article
clinical evaluation
diabetic macular edema
female
human
major clinical study
male
myopia
National Eye Institute Visual Function Questionnaire
patient attitude
quality of life
Rasch analysis
reliability
retina vein occlusion
scoring system
subretinal neovascularization
visual acuity
daily life activity
evaluation study
middle aged
national health organization
psychology
psychometry
quality of life
questionnaire
reproducibility
retina disease
standards
United States
very elderly
vision
Activities of Daily Living
Aged
Aged, 80 and over
Algorithms
Female
Humans
Male
Middle Aged
National Eye Institute (U.S.)
Psychometrics
Quality of Life
Reproducibility of Results
Retinal Diseases
Surveys and Questionnaires
United States
Vision, Ocular
Issue Date: 2017
Citation: Petrillo, J, Bressler, N.M, Lamoureux, E, Ferreira, A, Cano, S (2017). Development of a new Rasch-based scoring algorithm for the National Eye Institute Visual Functioning Questionnaire to improve its interpretability. Health and Quality of Life Outcomes 15 (1) : 157. ScholarBank@NUS Repository. https://doi.org/10.1186/s12955-017-0726-5
Rights: Attribution 4.0 International
Abstract: Background: The NEI VFQ-25 has undergone psychometric evaluation in patients with varying ocular conditions and the general population. However, important limitations which may affect the interpretation of clinical trial results have been previously identified, such as concerns with reliability and validity. The purpose of this study was to evaluate the National Eye Institute Visual Functioning Questionnaire (NEI VFQ25) and make recommendations for a revised scoring structure, with a view to improving its psychometric performance and interpretability. Methods: Rasch Measurement Theory analyses were conducted in two stages using pooled baseline NEI VFQ25 data for 2487 participants with retinal diseases enrolled in six clinical trials. In stage 1, we examined: scale-to-sample targeting; thresholds for item response options; item fit statistics; stability; local dependence; and reliability. In stage 2, a post-hoc revision of the scoring structure (VFQ-28R) was created and psychometrically re-evaluated. Results: In stage 1, we found that the NEI VFQ25 was mis-targeted to the sample, and had disordered response thresholds (15/25 items) and mis-fitting items (8/25 items). However, items appeared to be stable (differential item functioning for three items), have minimal item dependency (one pair of items) and good reliability (person-separation index, 0.93). In stage 2, the modified Rasch-scored NEI VFQ28R was assessed. It comprised two broad domains: Activity Limitation (19 items) and Socio-Emotional Functioning (nine items). The NEI VFQ28R demonstrated improved performance with fewer disordered response thresholds (no items), less item misfit (three items) and improved population targeting (reduced ceiling effect) compared with the NEI VFQ25. Conclusions: Compared with the original version, the proposed NEI VFQ28R, with Rasch-based scoring and a two-domain structure, appears to offer improved psychometric performance and interpretability of the vision-related quality of life scale for the population analysed. © 2017 The Author(s).
Source Title: Health and Quality of Life Outcomes
URI: https://scholarbank.nus.edu.sg/handle/10635/181255
ISSN: 14777525
DOI: 10.1186/s12955-017-0726-5
Rights: Attribution 4.0 International
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