Labiris Georgios, Gkika Maria G, Giarmoukakis Athanassios, Sideroudi Haris, Kyratzoglou Kostas, Kozobolis Vassilios P
Department of Ophthalmology, University Hospital of Alexandroupolis, Alexandroupolis, Greece.
Eur J Ophthalmol. 2012 May-Jun;22(3):466-76. doi: 10.5301/ejo.5000062.
To evaluate the psychometric properties of the Greek National Eye Institute Refractive Error Quality of Life Questionnaire (NEI-RQL-42).
We developed the Greek version of the instrument using forward and backward translation. To examine reliability, Cronbach alpha for each subscale was used as an index of internal consistency. Test-retest reliability was evaluated with intraclass correlation coefficients (ICC). Regarding construct validity, both convergent and discriminant validities were calculated by means of multi-trait analysis. Furthermore, the instrument was evaluated by Rasch analysis, as well.
Three patient groups were studied (emmetropes (n = 20), myopes (n = 41), and hyperopes (n = 18)). Emmetropes scored significantly better in the majority of subscales, while myopes scored better than hyperopes in clarity of vision (p = 0.012), near vision (p<0.001), and satisfaction with correction (p = 0.001). Cronbach alpha ranged from 0.490 (glare) to 0.948 (expectations), with most subscales having high internal consistency. The ICCs ranged from 0.76 to 0.93 for all subscales. All items passed the convergent and discriminant validity tests. Strong correlations were detected between uncorrected visual acuity and near vision, expectations, activity limitations, dependence on correction, worry, and suboptimal correction subscales. Rasch analysis revealed potential weaknesses of the instrument that are associated with the assumptions of the model itself. Specifically, 3 items and 17.5% of the participants fell outside the tolerance box. Moreover, principal component analysis indicated average unidimensionality for the instrument.
Traditional validation methods indicate that the Greek NEI-RQL-42 scale has adequate psychometric properties for comparative studies in local populations. Rasch analysis indicates significant misfits to the model that should be taken into consideration and evaluated in future studies. These misfits might reflect inherent weaknesses of the original NEI-RQL-42 and not of its adaptation to Greek norms.
评估希腊国家眼科研究所屈光不正生活质量问卷（NEI-RQL-42）的心理测量特性。
我们采用正向和反向翻译法开发了该问卷的希腊语版本。为检验信度，使用每个分量表的克朗巴哈α系数作为内部一致性指标。通过组内相关系数（ICC）评估重测信度。关于结构效度，通过多特质分析计算收敛效度和区分效度。此外，还采用拉施分析对该问卷进行了评估。
研究了三组患者（正视者（n = 20）、近视者（n = 41）和远视者（n = 18））。正视者在大多数分量表上得分显著更高，而近视者在视力清晰度（p = 0.012）、近视力（p<0.001）和矫正满意度（p = 0.001）方面得分高于远视者。克朗巴哈α系数范围为0.490（眩光）至0.948（期望），大多数分量表具有较高的内部一致性。所有分量表的ICC范围为0.76至0.93。所有项目均通过收敛效度和区分效度测试。在未矫正视力与近视力、期望、活动受限、对矫正的依赖、担忧及矫正不足分量表之间检测到强相关性。拉施分析揭示了该问卷与模型本身假设相关的潜在弱点。具体而言，3个项目和17.5%的参与者超出了容忍范围。此外，主成分分析表明该问卷具有平均单维性。
传统验证方法表明，希腊版NEI-RQL-42量表具有足够的心理测量特性，可用于当地人群的比较研究。拉施分析表明该问卷与模型存在显著不匹配，应在未来研究中予以考虑和评估。这些不匹配可能反映了原始NEI-RQL-42的固有弱点，而非其对希腊规范的适应性问题。
