Pakpour Amir H, Zeidi Isa Mohammadi, Saffari Mohsen, Labiris Georgios, Fridlund Bengt
Qazvin Research Center for Social Determinants of Health, Qazvin University of Medical Sciences, Qazvin, Iran.
Oman J Ophthalmol. 2013 Jan;6(1):37-43. doi: 10.4103/0974-620X.111911.
To evaluate the psychometric properties of the national Eye Institute refractive error correction quality of life questionnaire (NEI-RQL-42) among Iranian patients with refractive errors.
Two samples of patients (n1 = 296, n2 = 95) were consecutively selected from the eye clinic of the Boo-Ali Hospital, Qazvin. A forward-backward procedure was conducted to translate and cross-culturally adapt the Iranian version of the NEI-RQL-42. A homogeneity, stability, and reliability test was conducted for the first sample after a two-week interval. Convergent validity was computed using the correlation between the NEI-RQL-42 subscale scores, National Eye Institute-Visual Functioning Questionnaire (NEI-VFQ-25), and the Short Form-36 (SF-36). Furthermore, Known-group analysis was performed, to determine the discriminant validity between the subgroups of patients with hyperopia, emmetropia, and myopia. Responsiveness to clinical change was tested by administering NEI-RQL-42 on the second sample that was scheduled for surgery.
Homogeneity was satisfactory with the Cronbach's alpha coefficients ranging between 0.70 and 0.92. The 13 subscales of the NEI-RQL-42 showed a considerable stability in intra-class-correlation (ICC) ranging between 0.70 and 0.89. Positive correlation coefficients were found among all subscales of the NEI-RQL-42 and the other quality-of-life instruments (NEI-VFQ-25 and SF-36). The NEI-VFQ-25 displayed excellent discriminant validity to differentiate the subgroups of patients, and was found to be responsive to change after the surgical correction at three months.
The Iranian version of the NEI-RQL-42 is a valid and reliable instrument to assess refractive error correction quality-of-life in Iranian patients. Moreover this questionnaire can be used to evaluate the effectiveness of interventions in patients with refractive errors.
评估国家眼科研究所屈光不正矫正生活质量问卷（NEI-RQL-42）在伊朗屈光不正患者中的心理测量学特性。
从加兹温市布阿里医院眼科门诊连续选取两组患者样本（n1 = 296，n2 = 95）。采用前后翻译程序对NEI-RQL-42的伊朗版本进行翻译和跨文化调适。对第一个样本在间隔两周后进行同质性、稳定性和信度测试。使用NEI-RQL-42分量表得分、国家眼科研究所视觉功能问卷（NEI-VFQ-25）和简明健康状况调查问卷（SF-36）之间的相关性计算收敛效度。此外，进行已知组分析，以确定远视、正视和近视患者亚组之间的区分效度。通过对计划进行手术的第二个样本施用NEI-RQL-42来测试对临床变化的反应性。
克朗巴哈系数在0.70至0.92之间，同质性令人满意。NEI-RQL-42的13个分量表在组内相关系数（ICC）方面显示出相当的稳定性，范围在0.70至0.89之间。在NEI-RQL-42的所有分量表与其他生活质量工具（NEI-VFQ-25和SF-36）之间发现了正相关系数。NEI-VFQ-25在区分患者亚组方面显示出优异的区分效度，并且发现在三个月的手术矫正后对变化有反应。
NEI-RQL-42的伊朗版本是评估伊朗患者屈光不正矫正生活质量的有效且可靠的工具。此外，该问卷可用于评估屈光不正患者干预措施的有效性。
