4.2 Article

Reliability and validity of pediatric powered mobility outcome measures

Journal

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/17483107.2020.1819449

Keywords

Outcome measures; paediatric powered mobility; reliability; validity

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Funding

  1. ALYN Hospital
  2. University of Haifa

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The purpose of this study was to evaluate the reliability of the Powered Mobility Program (PMP) and the Israel Ministry of Health Powered Mobility Proficiency Test (PM-PT), as well as the Assessment of Learning Powered Mobility (ALP) tool, and to examine their validity for children with physical disabilities. The results showed good to excellent intra- and inter-rater reliability for both PMP and PM-PT, as well as good inter-rater reliability for ALP. The convergent validity between all three measures was also good to excellent.
Purpose: To determine the intra-rater and inter-rater reliability of the Powered Mobility Program (PMP) and the Israel Ministry of Health Powered Mobility Proficiency Test (PM-PT); to test inter-rater reliability of the Assessment of Learning Powered Mobility (ALP) tool; to determine the convergent validity of these measures for children with physical disabilities. Materials and methods: Participants included 30 children (mean 10 years, 6 months [SD 3 years, 7 months]; range: 6-18 years) with cerebral palsy and other neuromuscular disorders. Participants were non-proficient powered wheelchair drivers. Two blinded raters assessed the driving ability by viewing videos of the participants twice as they drove a pre-designed route at ALYN Hospital, Israel. They were assessedviathe PMP, ALP and PM-PT outcome measures. Intra-class correlation coefficients (ICC2,1) were used to test intra-rater and inter-rater reliability and Spearman correlation coefficients were used to assess convergent validity. Results: The PMP intra-rater reliability revealed ICCs2,1 of coefficients were 0.97/0.98 for both raters. For the PM-PT the ICC2,1 was 0.89/0.96 for both raters. The PMP inter-rater reliability ICC2,1 was 0.94/0.87 for the two tests, for the PM-PT the ICC2,1 was 0.91/0.87 for the two tests and for the ALP the ICC2,1 was 0.83. The convergent validity between the PMP and the PM-PT was r(s) = 0.96, between the PMP and ALP was r(s) = 0.89 and between the PM-PT and ALP was r(s) = 0.87. Conclusions: The PMP and PM-PT intra and interrater reliability were good to excellent, the ALP inter-rater reliability was good and the convergent validity between all three measures was good to excellent.

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