Development of the Ultra-Low Vision Visual Functioning Questionnaire (ULV-VFQ).
Development of the Ultra-Low Vision Visual Functioning Questionnaire (ULV-VFQ).
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DOI：
10.1167/tvst.6.3.11
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发表时间：
2017-05
影响因子：
3
通讯作者：
and the PLOVR Study Group
中科院分区：
文献类型：
--
作者：
Jeter PE;Rozanski C;Massof R;Adeyemo O;Dagnelie G;and the PLOVR Study Group
制定超低视力 (ULV) 人群的视觉功能问卷 (VFQ) 并进行心理测量评估。问卷项目基于 ULV 人群自我报告的视觉活动，按功能视觉领域（例如移动性）和视觉方面（例如对比度）进行分类，以确保分布具有代表性。在第 1 轮中，生成了 149 个项目的初始集合，并向 90 名 ULV 参与者（视力 [VA] ≤ 20/500；平均 [SD] 年龄 61 [15] 岁）进行管理，其中包括 6 名视网膜植入患者。通过 Rasch 分析评估心理测量特性，并在第 2 轮中对 80 名参与者进行了修订后的一组（150 个项目）。在第 1 轮中，人员测量分布（范围，8.6 logits）相对于项目测量集中在 -1.50 logits。在第 2 轮中，人员测量分布（范围，9.5 logits）相对于项目均值集中在 -0.86。两轮的可靠性指数（项目）为 0.97，人员为 0.99。 Infit 分析显示，第 1 轮中有 4 个欠拟合项，第 2 轮有 5 个欠拟合项，且 z 分数大于 4 截止值。对残差的主成分分析发现解释方差为 69.9%；无法解释的方差中最大的部分小于 3%。 ULV-VFQ 使用 ULV 人群生成的内容开发，在 ULV 人群中表现出出色的心理测量特性以及卓越的测量有效性。 ULV-VFQ 是假体低视力康复 (PLoVR) 开发计划的一部分，是为评估 ULV 人群的功能性视力而开发的新型 VFQ。
To develop and psychometrically evaluate a visual functioning questionnaire (VFQ) in an ultra-low vision (ULV) population. Questionnaire items, based on visual activities self-reported by a ULV population, were categorized by functional visual domain (e.g., mobility) and visual aspect (e.g., contrast) to ensure a representative distribution. In Round 1, an initial set of 149 items was generated and administered to 90 participants with ULV (visual acuity [VA] ≤ 20/500; mean [SD] age 61 [15] years), including six patients with a retinal implant. Psychometric properties were evaluated through Rasch analysis and a revised set (150 items) was administered to 80 participants in Round 2. In Round 1, the person measure distribution (range, 8.6 logits) was centered at −1.50 logits relative to the item measures. In Round 2, the person measure distribution (range, 9.5 logits) was centered at −0.86 relative to the item mean. The reliability index in both rounds was 0.97 for Items and 0.99 for Persons. Infit analysis showed four underfit items in Round 1, five underfit items in Round 2 with a z-score greater than 4 cutoff. Principal component analysis on the residuals found 69.9% explained variance; the largest component in the unexplained variance was less than 3%. The ULV-VFQ, developed with content generated from a ULV population, showed excellent psychometric properties as well as superior measurement validity in a ULV population. The ULV-VFQ, part of the Prosthetic Low Vision Rehabilitation (PLoVR) development program, is a new VFQ developed for assessment of functional vision in ULV populations.