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. 2023 May 2:2023:5291949.
doi: 10.1155/2023/5291949. eCollection 2023.

Assessment of the Psychometric Properties of the Danish VISA-P

Anne-Sofie Agergaard  1   2   3 , Jonathan D Comins  4   5 , Volkert Siersma  6 , Nikolaj M Malmgaard-Clausen  1   2 , Christian Couppe  1   2   3 , Mikkel H Hjortshoej  1   2   3 , Jens L Olesen  7 , S Peter Magnusson  1   2   3
Affiliations

Assessment of the Psychometric Properties of the Danish VISA-P

Anne-Sofie Agergaard et al. Transl Sports Med. .

Abstract

Purpose: The objective of the current study was to conduct a rigorous assessment of the psychometric properties of the Victorian Institute of Sports Assessment-patellar tendinopathy (VISA-P).

Methods: Rasch analysis, confirmatory factor analysis (CFA), and multivariable linear regression were used to assess the psychometric properties of the VISA-P questionnaire in 184 Danish patients with patellar tendinopathy who had symptoms ranging from under 3 months to over 1 year. A group of 100 healthy Danish persons was included as a reference for known-group validation.

Results: The analyses revealed that the 8-item VISA-P did not fit a unidimensional model, yielded at best a 3-factor model, and exhibited differential item functioning (DIF) across healthy subjects versus people with patellar tendinopathy.

Conclusion: VISA-P in its present form does not satisfy a measurement model and is not a robust scale for measuring patellar tendinopathy. A new PROM for patellar tendinopathy should be developed and appropriately validated, and meanwhile, simple pain scoring (e.g., numeric rating scales) and functional tests are suggested as more appropriate outcome measures for studies of patellar tendinopathy.

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Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Response frequencies of symptomatic participants for item 1 (a) and 3 (b), showing substantial ceiling effect.
See this image and copyright information in PMC

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