Journal article
Reducing respondent burden: validation of the Brief Impact of Vision Impairment questionnaire
EK Fenwick, REK Man, G Rees, J Keeffe, TY Wong, EL Lamoureux
Quality of Life Research | SPRINGER | Published : 2017
Abstract
Purpose: To develop a psychometrically sound and valid Brief Impact of Vision Impairment (IVI) questionnaire. Methods: Cross-sectional data from four prospective studies (2001–2008) were pooled and randomly divided into development/validation sets (n = 416) each. Items with suboptimal psychometric properties were iteratively removed in the development set to form the Brief IVI. Psychometric properties of the Brief IVI were independently tested in the validation sample. Correlation between person measures from the original and Brief IVI was assessed [Pearson r and intraclass correlation coefficient (ICC)]. Criterion validity was determined by testing the Brief IVI’s ability to discriminate le..
View full abstractGrants
Awarded by National Health and Medical Research Council
Funding Acknowledgements
Prof. Ecosse Lamoureux was supported by an Australian National Health and Medical Research Council (NHMRC) Senior Research Fellowship (#1045280). Dr. Eva Fenwick is currently funded by a NHMRC Early Career Fellowship (#1072987), and Dr. Gwyn Rees is funded by an NHMRC Career Development Fellowship (#1061801). The funding organizations had no role in the design or conduct of this research or preparation of this manuscript. The Centre for Eye Research Australia receives Operational Infrastructure Support from the Victorian Government.