Rasch analysis of the Burke Lateropulsion Scale (BLS)

Melissa Birnbaum; Kim Brock; Stephanie Parkinson; Elissa Burton; Ross Clark; Keith D Hill

doi:10.1080/10749357.2020.1824724

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Rasch analysis of the Burke Lateropulsion Scale (BLS)

Journal article

Peer reviewed

Rasch analysis of the Burke Lateropulsion Scale (BLS)

Melissa Birnbaum, Kim Brock, Stephanie Parkinson, Elissa Burton, Ross Clark and Keith D Hill

Topics in Stroke Rehabilitation, Vol.28(4), pp.268-275

2021

DOI: https://doi.org/10.1080/10749357.2020.1824724

PMID: 32975165

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Abstract

Psychometrics

lateropulsion

stroke

patient outcome assessment

Lateropulsion is a common problem following stroke. Whilst the Burke Lateropulsion Scale (BLS) is recommended in the literature as the outcome measure of choice for measuring lateropulsion, the internal validity of the BLS has not been investigated. To evaluate the internal validity of the BLS for use in evaluating the effectiveness of therapies aimed at reducing lateropulsion. Rasch analysis procedures were undertaken including assessment of overall model fit, item, and person fit, threshold ordering, differential item functioning, internal consistency, targeting, and dimensionality. Data from 132 participants were utilized to perform Rasch analysis of the BLS. In this preliminary study, overall model fit and individual item and person fit were found to be good using fit residual statistics and chi-square probability values. The BLS was found to be unidimensional and have good internal consistency (Person Separation Index 0.867). Thresholds for four of the five items were found to be only marginally disordered and were subsequently not modified. Non-uniform differential item functioning was detected for age for the transfers item; however, this item did not display item misfit and was therefore not removed. This study identified good psychometric properties of the BLS using Rasch analysis and supports the use of the BLS as a measure of lateropulsion following stroke. Further use of Rasch analysis on the BLS using a larger sample is recommended to confirm these preliminary findings and allow transformation into an interval-level scale.

Details

Title: Rasch analysis of the Burke Lateropulsion Scale (BLS)
Authors: Melissa Birnbaum (Author) - Curtin University
Kim Brock (Author) - St Vincent's Hospital Melbourne
Stephanie Parkinson (Author) - Curtin University
Elissa Burton (Author) - Curtin University
Ross Clark (Author) - University of the Sunshine Coast, Queensland, School of Health and Sport Sciences - Legacy
Keith D Hill (Author) - Monash University
Publication details: Topics in Stroke Rehabilitation, Vol.28(4), pp.268-275
Publisher: Taylor & Francis
Date published: 2021
DOI: 10.1080/10749357.2020.1824724
ISSN: 1945-5119
PMID: 32975165
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy; School of Health - Public Health
Language: English
Record Identifier: 99482298802621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Rehabilitation

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