[
    {
        "id": "osp-12879",
        "type": "article-journal",
        "title": "Psychometric properties of the national eye institute refractive error correction quality-of-life questionnaire among Iranian patients",
        "author": [
            {
                "family": "Pakpour",
                "given": "Amir H"
            },
            {
                "family": "Zeidi",
                "given": "Isa Mohammadi"
            },
            {
                "family": "Saffari",
                "given": "Mohsen"
            },
            {
                "family": "Labiris",
                "given": "Georgios"
            },
            {
                "family": "Fridlund",
                "given": "Bengt"
            }
        ],
        "URL": "https://omanscience.com/ar/articles/psychometric-properties-of-the-national-eye-institute-refractive-error-correction-quality-of-life-questionnaire-among-iranian-patients",
        "language": "en",
        "issued": {
            "date-parts": [
                [
                    2013
                ]
            ]
        },
        "container-title": "Oman Journal of Ophthalmology",
        "volume": "6",
        "issue": "1",
        "page": "37-43",
        "DOI": "10.4103/0974-620x.111911",
        "publisher": "Medknow Publications",
        "ISSN": "0974-620X",
        "abstract": "Background and aim: 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.\n\nMaterials and methods: 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.\n\nResults: 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.\n\nConclusions: 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."
    }
]