1 Department of Health Policy and Administration, Washington State University, Spokane, Washington, USA 2 The Section of the Basic Health Sciences, Marmara University Health Education Faculty, Cevizli, Kartal, Istanbul, Turkey.
Patient. 2008 Apr 1;1(2):115-25. doi: 10.2165/01312067-200801020-00007.
To assess the psychometric performance of the National Eye Institute 25-item Visual Function Questionnaire (NEI VFQ-25) in Turkish diabetic retinopathy patients.Reliability of the Turkish version of the NEI VFQ-25 was tested by internal consistency and test-retest reliability. Convergent validity was assessed by examining the correlation between total scores of the Turkish version of the NEI VFQ-25 and the SF-36. Principal component analysis was used to determine the best loading of items in the Turkish version of the NEI VFQ-25.
Health-related quality of life was measured in a sample of 60 patients with diabetic retinopathy using both a Turkish version of the NEI VFQ-25 and the SF-36 instrument. The Turkish version of the NEI VFQ-25 was developed by following established cross-cultural adaptation and validation guidelines. After pilot testing, an interview administrator's scale for the newly translated NEI VFQ-25 was administered to 60 diabetic retinopathy patients at Haydarpasa Numune Research and Training Hospital in Istanbul, Turkey.Reliability of the Turkish version of the NEI VFQ-25 was tested by internal consistency and test-retest reliability. Convergent validity was assessed by examining the correlation between total scores of the Turkish version of the NEI VFQ-25 and the SF-36. Principal component analysis was used to determine the best loading of items in the Turkish version of the NEI VFQ-25.
The internal consistency within the domains of the NEI VFQ-25 was high, with a Cronbach's α coefficient of 0.88 for the NEI VFQ-25 scale. Reliability of the NEI VFQ-25 was also high, with a test-retest intra-class correlation value of 0.85. Significant correlations were observed between the total scores of the NEI VFQ-25 and the SF-36.
Overall, the results indicated that the psychometric performance of the NEI VFQ-25 in the study sample was very strong, and the instrument was found to be valid and reliable. The instrument is likely to be suitable for use in clinical studies of chronic eye diseases in Turkey.
评估国家眼科研究所 25 项视觉功能问卷（NEI VFQ-25）在土耳其糖尿病视网膜病变患者中的心理计量性能。通过内部一致性和重测信度测试了土耳其语版 NEI VFQ-25 的信度。通过检查土耳其语版 NEI VFQ-25 的总分与 SF-36 的相关性来评估收敛效度。主成分分析用于确定土耳其语版 NEI VFQ-25 中项目的最佳加载。
使用土耳其语版 NEI VFQ-25 和 SF-36 工具，对 60 例糖尿病视网膜病变患者的健康相关生活质量进行了测量。通过遵循既定的跨文化适应和验证指南，开发了土耳其语版 NEI VFQ-25。经过初步测试，在土耳其伊斯坦布尔 Haydarpasa Numune 研究和培训医院，对新翻译的 NEI VFQ-25 进行了采访管理员量表，对 60 例糖尿病视网膜病变患者进行了管理。通过内部一致性和重测信度测试了土耳其语版 NEI VFQ-25 的信度。通过检查土耳其语版 NEI VFQ-25 的总分与 SF-36 的相关性来评估收敛效度。主成分分析用于确定土耳其语版 NEI VFQ-25 中项目的最佳加载。
NEI VFQ-25 各领域的内部一致性较高，NEI VFQ-25 量表的 Cronbach's α 系数为 0.88。NEI VFQ-25 的可靠性也很高，测试重测的组内相关值为 0.85。在 NEI VFQ-25 的总分和 SF-36 之间观察到显著的相关性。
总体而言，研究结果表明，研究样本中 NEI VFQ-25 的心理计量性能非常强，该工具具有有效性和可靠性。该工具可能适用于土耳其慢性眼病的临床研究。
