期刊
DISABILITY AND REHABILITATION
卷 -, 期 -, 页码 -出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09638288.2023.2199220
关键词
Lower limb amputation; prosthesis; embodiment; rehabilitation; outcome; validation; Rasch analysis
This study conducted a detailed psychometric Rasch analysis of the Prosthesis Embodiment Scale (PEmbS) in adults with lower limb amputation (LLA). By making appropriate revisions, the PEmbS was shown to be a useful tool for assessing prosthetic embodiment in amputees.
PurposeTo perform a detailed psychometric Rasch analysis of the Prosthesis Embodiment Scale (PEmbS) administered in adults with lower limb amputation (LLA).MethodsA convenience sample of German-speaking adults with LLA (n = 150), recruited from German state agencies' databases, was asked to complete the PEmbS, a 10-item patient-reported scale assessing prosthesis embodiment.ResultsThe local dependency between two items was resolved by keeping for the global score only the lower score of these two items (#9 and #10). Collapsing the seven response categories to four (two expressing disagreement and two agreement) eliminated disordered thresholds. After that, the PEmbS demonstrated unidimensionality, acceptable item fit, and good reliability indices. A keyform plot was created to transform raw scores into linear measures of prosthesis embodiment, making it possible to compare the individual's item responses with those expected by the Rasch model, and to manage missing responses.ConclusionsThe PEmbS is useful for assessing prosthesis embodiment in people with LLA, both for research and clinical purposes. We propose a revised version of the PEmbS for lower limb amputees; its appropriateness in other LLA contexts requires further investigation.
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