Department of Health Sciences, Lund University, Lund, Sweden.
Department of Neurology, Rehabilitation Medicine, Memory Disorders and Geriatrics, Skåne University Hospital, Lund, Sweden.
PM R. 2023 Jun;15(6):751-760. doi: 10.1002/pmrj.12861. Epub 2022 Aug 27.
Fear of falling (FoF) is very common in persons with late effects of polio (LEoP). An internationally recognized rating scale to assess FoF is the Falls Efficacy Scale-International (FES-I). Yet, there is limited knowledge about its measurement properties in persons with LEoP.
To investigate the measurement properties of the FES-I (16-item version) and the short FES-I (7-item version) in persons with LEoP.
Explorative factor analysis and Rasch model analysis of cross-sectional data.
University hospital.
A total of 321 persons with LEoP (mean age ± standard deviation [SD] 70 ± 10 years, 173 women).
The FES-I and the short FES-I, comprising four response options about concerns of falling ranging from 1 (not at all concerned) to 4 (very concerned).
Data were collected by a postal survey. First, a factor analysis was performed to investigate the unidimensionality of the scale. Thereafter, a Rasch model analysis was used to further analyze the measurement properties of the FES-I and the short FES-I, such as local dependency, targeting, hierarchical order of items, Differential Item Functioning (DIF), response category functioning and reliability (Person Separation Index, PSI). Raw score transformation to interval measurements was also performed.
The factor analysis revealed that the FES-I was unidimensional, even though the Rasch analysis showed some misfit to the Rasch model and local dependency. Targeting for the FES-I and the short FES-I was somewhat suboptimal as the participants on average reported less FoF than expected. A negligible gender DIF was found for two items in the FES-I and for one item in the short FES-I. Reliability was high (PSI >0.86), and the response category thresholds worked as intended for both the FES-I and the short FES-I.
The FES-I and the short FES-I have sufficient measurement properties in persons with LEoP. Both versions can be used to assess fear of falling (or FoF) in this population.
对患有脊髓灰质炎后遗症（LEoP）的人来说，恐摔（FoF）非常普遍。国际上公认的评估 FoF 的量表是跌倒效能量表-国际版（FES-I）。然而，对于 LEoP 患者，其测量特性的相关知识还很有限。
调查 FES-I（16 项版本）和 FES-I（7 项简短版本）在 LEoP 患者中的测量特性。
横断面数据的探索性因子分析和 Rasch 模型分析。
大学医院。
共 321 名 LEoP 患者（平均年龄±标准差[SD]70±10 岁，173 名女性）。
FES-I 和 FES-I 简短版，包含四个关于摔倒担忧的选项，范围从 1（完全不担心）到 4（非常担心）。
通过邮寄调查收集数据。首先，进行因子分析以调查量表的单维性。然后，使用 Rasch 模型分析进一步分析 FES-I 和 FES-I 简短版的测量特性，如局部依存、目标、项目的层次顺序、差异项目功能（DIF）、反应类别功能和可靠性（个体分离指数，PSI）。还对原始分数进行了区间测量的转换。
因子分析表明 FES-I 是单维的，尽管 Rasch 分析显示与 Rasch 模型存在一些不匹配和局部依存。FES-I 和 FES-I 简短版的目标定位有些不理想，因为参与者报告的 FoF 平均低于预期。发现 FES-I 中有两个项目和 FES-I 简短版中有一个项目存在性别差异。可靠性很高（PSI>0.86），并且 FES-I 和 FES-I 简短版的反应类别阈值都符合预期。
FES-I 和 FES-I 简短版在 LEoP 患者中有足够的测量特性。这两个版本都可用于评估该人群的恐摔。
