Department of Optometry and Vision Science, Flinders Medical Centre and Flinders University of South Australia, Bedford Park, South Australia, Australia.
Invest Ophthalmol Vis Sci. 2011 Jul 29;52(8):5685-94. doi: 10.1167/iovs.10-67951.
To explore the psychometric properties of the 13 subscales of the NEI-RQL-42 questionnaire using Rasch analysis.
The NEI-RQL-42 is a refractive error-related quality of life (QoL) questionnaire with a complex design; its 13 subscales contain 42 questions, which include 16 different question/response category formats. It was completed by 100 laser refractive surgery subjects (spectacle and contact lens wearers) pre- and postoperatively. Rasch analysis was used to assess the use of response categories, success in measuring a single trait per subscale (unidimensionality), ability to discriminate persons (precision), and targeting of the questions to person QoL.
Response categories were misused in four subscales (clarity of vision, diurnal fluctuation, symptoms, and appearance), which required repair before further analyses. Six subscales contained items that did not contribute to a single trait measurement (multidimensional). All subscales were found to be inadequate at distinguishing between persons (person separation >2.0), and targeting of the questions to QoL was poor for six subscales.
The NEI-RQL-42 questionnaire is deficient for all psychometric properties tested. Clinicians or researchers wishing to measure QoL related to refractive error correction should consider other questionnaires that have been rigorously developed and meet standard psychometric properties.
使用 Rasch 分析探讨 NEI-RQL-42 问卷的 13 个分量表的心理计量特性。
NEI-RQL-42 是一种与屈光不正相关的生活质量（QoL）问卷，设计复杂；其 13 个分量表包含 42 个问题，其中包含 16 种不同的问题/应答类别格式。它由 100 名激光屈光手术患者（戴眼镜和隐形眼镜者）术前和术后完成。使用 Rasch 分析评估响应类别、每个分量表成功测量单一特征的能力（单维性）、区分个体的能力（精度）以及问题对个体 QoL 的针对性。
四个分量表（视力清晰度、昼夜波动、症状和外观）的响应类别被误用，在进一步分析之前需要修复。六个分量表包含不能对单一特征测量做出贡献的项目（多维）。所有分量表在区分个体方面都不足（个体分离>2.0），并且六个分量表的问题对 QoL 的针对性都很差。
NEI-RQL-42 问卷在所有测试的心理计量特性方面都存在缺陷。希望测量与屈光不正矫正相关的 QoL 的临床医生或研究人员应考虑其他经过严格开发并符合标准心理计量特性的问卷。
