Department of Ophthalmology, Zhongshan Hospital, Fudan University, Shanghai, PR China.
Department of ophthalmology, hospital of Zhejiang people's armed police, Hangzhou, PR China.
Transl Vis Sci Technol. 2024 Nov 4;13(11):20. doi: 10.1167/tvst.13.11.20.
To develop a short form of Chinese ULV-VFQ-50 based on the ULV-VFQ-150 and compare the psychometrical properties of the two questionnaires.
We selected candidate items from the ULV-VFQ-150, considering the item response among ultra-low vision (ULV) participants, the even distribution of item measures, visual aspects, and visual domains, to construct a 50-item ULV-VFQ-50 questionnaire. Then, ULV participants were recruited to evaluate its psychometric characteristics by using Rasch analysis.
In total, 79 out of 79 completed questionnaires of ULV-VFQ-50 were collected, of which 11 filled questionnaires were excluded because the participants' vision did not meet the inclusion criteria. Thus 68 valid questionnaires were analyzed (valid response rate 91.9%). The average age of the eligible responders was 45.0 years (standard deviation [SD] = 16.7), with 42.6% females (29/68). As per Rasch analysis, the person measures ranged from -1.74 to 4.91 logits, and the item measures ranged from -1.56 to 1.15 logits. The mean value of item difficulty was 0.00 logits, whereas the mean value of personnel distribution was -0.35 logits. The item reliability was 0.95, and the person reliability was 0.98. The items conform to unidimensionality as indicated by principal component analysis of the residuals, which showed that the first principal component unexplained only 5.5% of the total variance, and each component after that unexplained even less.
The Chinese ULV-VFQ-50 exhibits excellent psychometric properties. The short form of Chinese ULV-VFQ, with fewer items and less administration time is better suited for clinical practice and research settings.
The Chinese version of ULV-VFQ-50 is a reliable assessment of the visual function for people with ULV in China.
基于 UL-VFQ-150 开发中文超视觉需求问卷（ULV-VFQ-50）短式版本，并比较两个问卷的心理测量特性。
我们从 UL-VFQ-150 中选择候选条目，考虑超视觉（ULV）参与者的项目反应、项目测量的均匀分布、视觉方面和视觉领域，构建了一个 50 项 ULV-VFQ-50 问卷。然后，我们招募 ULV 参与者使用 Rasch 分析评估其心理测量特征。
共收集到 79 份完整的 ULV-VFQ-50 问卷，其中 11 份因参与者的视力不符合纳入标准而被排除。因此，对 68 份有效问卷进行了分析（有效应答率为 91.9%）。合格应答者的平均年龄为 45.0 岁（标准差[SD]=16.7），女性占 42.6%（29/68）。根据 Rasch 分析，人员测量范围从-1.74 到 4.91 对数单位，项目测量范围从-1.56 到 1.15 对数单位。项目难度的平均值为 0.00 对数单位，人员分布的平均值为-0.35 对数单位。项目可靠性为 0.95，人员可靠性为 0.98。项目符合单维性，这是通过残差的主成分分析表明的，表明第一个主成分仅解释了总方差的 5.5%，此后每个成分解释的更少。
中文 ULV-VFQ-50 具有优异的心理测量特性。中文 ULV-VFQ 的短式版本，项目较少，管理时间较短，更适合临床实践和研究环境。
李慧琳
