Development of a new Rasch-based scoring algorithm for the National Eye Institute Visual Functioning Questionnaire to improve its interpretability
Jennifer Petrillo, Neil M Bressler, Ecosse Lamoureux, Alberto Ferreira, Stefan Cano
HEALTH AND QUALITY OF LIFE OUTCOMES | BIOMED CENTRAL LTD | Published : 2017
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 reti..View full abstract
This project was sponsored by Novartis Pharma AG, Basel, Switzerland.