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Validity and Reliability of the Turkish Version of the Revised Low Vision Independence Measure (LVIM-R)
Esma Özkan1, Bayazıt İlhan2, Theresa M Smith3
1Esma Özkan, PhD, PT, is Assistant Professor, Department of Occupational Therapy, Faculty of Gülhane Health Sciences, University of Health Sciences Turkey, Ankara, Turkey; esma.ozkan@sbu.edu.tr.
Importance:
Few tools are available for assessing the activity performance of people with low vision. Additional practical instruments are required for occupational therapy evaluation.
Objective:
To evaluate the validity and reliability of the Turkish version of the Revised Low Vision Independence Measure (LVIM-R).
Design:
We analyzed Turkish LVIM-R items using confirmatory factor analysis with parceling. Test-retest reliability was measured using the intraclass correlation coefficient (ICC). The study was conducted between April 2020 and July 2021.
Setting:
Ophthalmology clinic.
Participants:
The study included 89 people with low vision who applied to an ophthalmology training and research clinic. Participants were age ≥18 yr, had visual acuity of 0.5 to 1.3 logarithms of the minimum angle of resolution, and consented to participate.
Intervention:
Not applicable.
Outcomes And Measures:
Turkish version of the LVIM-R, a self-report measure of activity performance for people with low vision.
Results:
In the principal-components analysis, the highest eigenvalue was Armor's θ = .966. ICCs were .995 for Visual Field or Scotoma, .997 for Visual Acuity, and .997 for Total score. Other results included χ2 = 9.566 (p = .297), comparative fit index = .998, Tucker-Lewis Index = .996, and root mean square error of approximation = .047. Goodness-of-fit indices support the structural validity of the two-factor model.
Conclusion:
The Turkish version of the LVIM-R is a valid and reliable assessment tool for occupational therapy practice in low vision rehabilitation. What This Article Adds: The Turkish LVIM-R is a valid and reliable assessment for use in low vision rehabilitation.
