Journal article
Properties of the impact of vision impairment and night vision questionnaires among people with intermediate age-related macular degeneration
MB McGuinness, RP Finger, Z Wu, CD Luu, FK Chen, JJ Arnold, U Chakravarthy, WJ Heriot, J Runciman, RH Guymer
Translational Vision Science and Technology | ASSOC RESEARCH VISION OPHTHALMOLOGY INC | Published : 2019
DOI: 10.1167/tvst.8.5.3
Abstract
Purpose: To explore the psychometric properties of the Impact of Vision Impairment (IVI-28) and Night Vision Questionnaires (NVQ-10) among people with intermediate age-related macular degeneration (iAMD). Methods: Baseline responses were collected from 288 participants (aged 50–88 years, 74% female) in the Laser intervention in Early stages of Age-related macular Degeneration (LEAD) study in Australia and Northern Ireland. Psychometric properties (discrimination, ordering of thresholds, person separation, item miss-fit, and differential item functioning according to sex) were explored using grouped rating scale and partial credit models. Spearman’s correlation was estimated to assess the ass..
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Awarded by Bupa Health Foundation
Funding Acknowledgements
The Laser intervention in Early stages of Agerelated macular Degeneration (LEAD) Study was supported by grants from the National Health & Medical Research Council (NHMRC) of Australia Project grant (1027624, RG and CL), the BUPA Health Foundation (Australia), and Ellex Medical Lasers, Ltd. (Australia) who also provided the investigational devices. RG is funded by a NHMRC Principal Research Fellowship 1103013. ZW received funding from NHMRC (Fellowship Grant 1104985). CERA received operational infrastructure support from the Victorian government and the NHMRC (Centre for Research Excellence grant 529923). FC received funding from NHMRC (Early Career Fellowship 1054712 and Career Development Fellowship 1142962).