Department of Health Sciences, Lund University, Lund, Sweden.
PM R. 2013 Mar;5(3):176-81; quiz 181. doi: 10.1016/j.pmrj.2012.07.007. Epub 2012 Aug 30.
To evaluate the construct validity of a new rating scale for self-reported impairments in persons with late effects of polio.
Psychometric analysis of data on self-perceived impairments in persons with prior polio.
Two hundred seventy-three persons with prior polio (119 men and 154 women; mean age, 63.5 years).
Rasch analysis of a 13-item rating scale with 5 response categories, in which the participants rated how much they have been bothered by various post-polio-related impairments during the past 2 weeks.
The initial analysis showed disordered categories, misfit with some of the items, multidimensionality, and local dependency. After adjustment of the categories, which resulted in a 4-category rating scale, fit to the model was achieved, but the scale still showed signs of multidimensionality. Analyses of local dependency revealed correlations among some of the items, which resulted in a 5 testlet solution, which gave fit to the model and unidimensionality.
After adjustment of the categories and local dependency, this new rating scale, Self-Reported Impairments in Persons With Late Effects of Polio, can be considered as unidimensional. The good psychometric properties implies that the Self-Reported Impairments in Persons With Late Effects of Polio scale could be a useful rating scale that would increase our understanding of the impairments that persons with late effects of polio can experience. With further refinements, this scale may assist in the planning and evaluation of appropriate rehabilitation interventions.
评估一种新的自评量表在评估小儿麻痹后遗症患者功能障碍方面的结构效度。
对既往患有小儿麻痹症患者的自我感知功能障碍数据进行心理计量学分析。
273 名既往患有小儿麻痹症的患者（男 119 名，女 154 名；平均年龄 63.5 岁）。
采用 5 级评分的 13 项自评量表的 Rasch 分析，患者在过去 2 周内对各种与小儿麻痹后相关的功能障碍的困扰程度进行自我评估。
初步分析显示，类别存在紊乱、部分项目拟合不良、多维性和局部依赖性。调整类别后，得到一个 4 级评分量表，模型拟合得到改善，但量表仍存在多维性的迹象。局部依赖性分析显示，部分项目之间存在相关性，进一步分解为 5 个测验模块，结果表明模型拟合和单维性得到改善。
在调整类别和局部依赖性后，这种新的自评量表，即小儿麻痹后遗症患者的自我报告功能障碍，可以被认为是单维的。良好的心理计量学特性表明，小儿麻痹后遗症患者的自我报告功能障碍量表可能是一种有用的评分量表，可以增加我们对小儿麻痹后遗症患者可能经历的功能障碍的理解。通过进一步改进，该量表可能有助于规划和评估适当的康复干预措施。
