Cross-validation of the Turkish version of the 25-item National Eye Institute Visual Functioning Questionnaire (NEI-VFQ 25)
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2005
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Abstract
Purpose: To test the validity and reliability of the Turkish version of the self-administered form of the National Eye Institute Visual Functioning Questionnaire (NEI-VFQ 25). Methods: Patients with no limitations to respond to a health status interview and affected by a chronic eye disease were enrolled. The Turkish versions of the abbreviated form of World Health Organization Quality of Life (WHOQOL-BREF) and the NEI-VFQ 25 instruments were administered to all participants. Results: The mean (SD) age of the participants was 60.9 (14.5) years. There were 61 patients with one of the following conditions: Cataract (57.4%), diabetic retinopathy (13.2%), age related macular degeneration (ARMD) (11.4%), glaucoma (9.8%) and degenerative myopia (8.2%). The Cronbach alpha of the overall scale was 0.97; the Cronbach alpha ranged from 0.94 to 0.78 for the subscales. The physical, psychological, environmental and social domains of the WHOQOL-BREF had fair to good correlations with the NEI-VFO 25 (r = 0.68 to r = 0.26), which indicated a sufficient convergent validity. Patients with lower visual acuity (VA) had lower index scores than those with higher VA (p = 0.001), which showed a sufficient responsiveness. Conclusion: Statistical analysis showed that Turkish version of the NEI-VFQ is a valid and reliable instrument to measure vision-related quality of life in patients with chronic eye diseases. Copyright © Taylor & Francis Inc.
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Cross-Cultural Comparison , Cross-Sectional Studies , Eye Diseases , Female , Health Surveys , Humans , Language , Male , Middle Aged , National Institutes of Health (U.S.) , Ophthalmology , Quality of Life , Questionnaires , Reproducibility of Results , Sickness Impact Profile , Turkey , United States , Vision Tests , Visual Acuity , adult , aged , article , cataract , controlled study , diabetic retinopathy , eye disease , female , glaucoma , health status , human , institutional care , interview , major clinical study , male , myopia , priority journal , quality of life , questionnaire , reliability , retina macula degeneration , scoring system , social aspect , Turkey (republic) , validation process , vision , visual acuity , world health organization , cross-sectional study , cultural factor , eye disease , health care organization , health survey , instrumentation , language , methodology , middle aged , ophthalmology , pathophysiology , physiology , quality of life , questionnaire , reproducibility , Sickness Impact Profile , United States , validation study , vision test , visual acuity