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Reliability testing of the Persian low-vision quality-of-life questionnaire based on Rasch analysis.
- Source :
- British Journal of Visual Impairment; Sep2024, Vol. 42 Issue 3, p874-884, 11p
- Publication Year :
- 2024
-
Abstract
- Objective: Low-vision quality-of-life (LVQOL) questionnaire was recently translated to Persian. Its model fit and construct validity were assessed by exploratory and confirmatory analysis for adults with visual impairment, before. In this study, we aimed to test the reliability of the Persian LVQOL questionnaire based on Rasch analysis. Methods: Overall, 100 low-vision patients and 100 demographic statue-matched control subjects were participated for evaluating reliability aspects. All the participants were asked to complete the Persian LVQOL questionnaire. The low-vision group was asked to fill out the LVQOL 3 months after rehabilitation to determine how rehabilitation changed the quality of life. Rasch analyses of the survey items were conducted using WINSTEPS. Results: All items fitted the Rasch model. Point-measure correlations values varied from.13 to.70, providing a preliminary indication of adequate construct validity. All factor loadings found more than.4. infit values for all other participants were in the acceptable range. All items obtained infit and outfit MSQ values of < 2.0. Patients' abilities relative to the item difficulty were analyzed. Item difficulty was estimated and item characteristic curves were included. Sufficient unidimensionality, hierarchical order, and equal interval scaring were obtained. Conclusion: The Persian LVQOL questionnaire was reliable enough and it will be valuable in both clinical practice and research. [ABSTRACT FROM AUTHOR]
- Subjects :
- MULTITRAIT multimethod techniques
DATA analysis
OPHTHALMOLOGISTS
MEDICAL quality control
RESEARCH funding
QUESTIONNAIRES
RESEARCH methodology evaluation
DESCRIPTIVE statistics
OPTOMETRISTS
REHABILITATION of blind people
QUALITY of life
STATISTICS
CASE-control method
RESEARCH methodology
PSYCHOMETRICS
LOW vision
COMPARATIVE studies
DATA analysis software
SOCIODEMOGRAPHIC factors
IRANIANS
PEOPLE with disabilities
RELIABILITY (Personality trait)
Subjects
Details
- Language :
- English
- ISSN :
- 02646196
- Volume :
- 42
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- British Journal of Visual Impairment
- Publication Type :
- Academic Journal
- Accession number :
- 179485259
- Full Text :
- https://doi.org/10.1177/02646196231195695