University Library
  • Login
A gateway to Melbourne's research publications
Minerva Access is the University's Institutional Repository. It aims to collect, preserve, and showcase the intellectual output of staff and students of the University of Melbourne for a global audience.
View Item 
  • Minerva Access
  • Medicine, Dentistry & Health Sciences
  • Melbourne Medical School
  • Ophthalmology (Eye & Ear Hospital)
  • Ophthalmology (Eye & Ear Hospital) - Research Publications
  • View Item
  • Minerva Access
  • Medicine, Dentistry & Health Sciences
  • Melbourne Medical School
  • Ophthalmology (Eye & Ear Hospital)
  • Ophthalmology (Eye & Ear Hospital) - Research Publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

    Development of a new Rasch-based scoring algorithm for the National Eye Institute Visual Functioning Questionnaire to improve its interpretability

    Thumbnail
    Download
    published version (639.5Kb)

    Citations
    Scopus
    Web of Science
    Altmetric
    5
    5
    Author
    Petrillo, J; Bressler, NM; Lamoureux, E; Ferreira, A; Cano, S
    Date
    2017-08-14
    Source Title
    Health and Quality of Life Outcomes
    Publisher
    BIOMED CENTRAL LTD
    University of Melbourne Author/s
    Lamoureux, Ecosse
    Affiliation
    Ophthalmology (Eye & Ear Hospital)
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    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), https://doi.org/10.1186/s12955-017-0726-5.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/256869
    DOI
    10.1186/s12955-017-0726-5
    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 VFQ-25) 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 VFQ-25 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 VFQ-25 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 VFQ-28-R was assessed. It comprised two broad domains: Activity Limitation (19 items) and Socio-Emotional Functioning (nine items). The NEI VFQ-28-R 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 VFQ-25. CONCLUSIONS: Compared with the original version, the proposed NEI VFQ-28-R, 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.

    Export Reference in RIS Format     

    Endnote

    • Click on "Export Reference in RIS Format" and choose "open with... Endnote".

    Refworks

    • Click on "Export Reference in RIS Format". Login to Refworks, go to References => Import References


    Collections
    • Minerva Elements Records [53039]
    • Ophthalmology (Eye & Ear Hospital) - Research Publications [599]
    Minerva AccessDepositing Your Work (for University of Melbourne Staff and Students)NewsFAQs

    BrowseCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects
    My AccountLoginRegister
    StatisticsMost Popular ItemsStatistics by CountryMost Popular Authors