Dataset: The Screening Visual Complaints questionnaire (SVCq) in people with Parkinson’s disease - Confirmatory factor analysis and advice for its use in clinical practice

DOI

Background: The Screening Visual Complaints questionnaire (SVCq) is a short questionnaire to screen for visual complaints in people with Parkinson’s disease (PD).Objective: The current study aims to investigate the factor structure of the SVCq to increase the usability of this measure in clinical practice and facilitate the interpretation of visual complaints in people with PD. Methods: We performed a confirmatory factor analysis using the 19 items of the SVCq of 581 people with PD, investigating the fit of three models previously found in a community sample: a one-factor model including all items, and models where items are distributed across either three or five factors. The clinical value of derived subscales was explored by comparing scores with age-matched controls (N = 583), and by investigating relationships to demographic and disease- related characteristics. Results: All three models showed a good fit in people with PD, with the five-factor model outperforming the three-factor and one-factor model. Five factors were distinguished: ‘Diminished visual perception – Function related’ (5 items), ‘Diminished visual perception – Luminance related’ (3 items), ‘Diminished visual perception – Task related’ (3 items), ‘Altered visual perception’ (6 items), and ‘Ocular discomfort’ (2 items). On each subscale, people with PD reported more complaints than controls, even when there was no ophthalmological condition present. Furthermore, subscales were sensitive to relevant clinical characteristics, like age, disease duration, severity, and medication use. Conclusions: The five-factor model showed a good fit in people with PD and has clinical relevance. Each subscale provides a solid basis for individualized visual care.

Identifier
DOI https://doi.org/10.34894/V9IGKJ
Metadata Access https://dataverse.nl/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=doi:10.34894/V9IGKJ
Provenance
Creator van der Lijn, I ORCID logo; de Haan, G.A. ORCID logo; van der Feen, F.E. (ORCID: 0000-0001-8390-693X); Huizinga, F. ORCID logo; Fuermaier, A.B.M. ORCID logo; van Laar, T. (ORCID: 0000-0001-5088-480X); Heutink, J. (ORCID: 0000-0002-4811-968X)
Publisher DataverseNL
Contributor Groningen Digital Competence Centre
Publication Year 2022
Rights info:eu-repo/semantics/restrictedAccess
OpenAccess false
Contact Groningen Digital Competence Centre (University of Groningen)
Representation
Resource Type Dataset
Format application/pdf; application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size 526649; 390211; 300150; 158568
Version 2.0
Discipline Agriculture, Forestry, Horticulture, Aquaculture; Agriculture, Forestry, Horticulture, Aquaculture and Veterinary Medicine; Life Sciences; Medicine; Social Sciences; Social and Behavioural Sciences; Soil Sciences