Rasch analysis of the participation scale (P-scale): usefulness of the P-scale to a rehabilitation services network.

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TitleRasch analysis of the participation scale (P-scale): usefulness of the P-scale to a rehabilitation services network.
Publication TypeJournal Article
AuthorsSouza MAP, Coster WJ, Mancini MC, Dutra FCMS, Kramer J, Sampaio RF
Abbrev. JournalBMC Public Health
JournalBMC public health
Year of Publication2017
Volume17
Issue1
Pagination934
Publication Languageeng
KeywordsDisability, Participation, Participation scale, Rehabilitation
Abstract

BACKGROUND: A person's participation is acknowledged as an important outcome of the rehabilitation process. The Participation Scale (P-Scale) is an instrument that was designed to assess the participation of individuals with a health condition or disability. The scale was developed in an effort to better describe the participation of people living in middle-income and low-income countries. The aim of this study was to use Rasch analysis to examine whether the Participation Scale is suitable to assess the perceived ability to take part in participation situations by patients with diverse levels of function.

METHODS: The sample was comprised by 302 patients from a public rehabilitation services network. Participants had orthopaedic or neurological health conditions, were at least 18 years old, and completed the Participation Scale. Rasch analysis was conducted using the Winsteps software.

RESULTS: The mean age of all participants was 45.5 years (standard deviation = 14.4), 52% were male, 86% had orthopaedic conditions, and 52% had chronic symptoms. Rasch analysis was performed using a dichotomous rating scale, and only one item showed misfit. Dimensionality analysis supported the existence of only one Rasch dimension. The person separation index was 1.51, and the item separation index was 6.38. Items N2 and N14 showed Differential Item Functioning between men and women. Items N6 and N12 showed Differential Item Functioning between acute and chronic conditions. The item difficulty range was -1.78 to 2.09 logits, while the sample ability range was -2.41 to 4.61 logits.

CONCLUSIONS: The P-Scale was found to be useful as a screening tool for participation problems reported by patients in a rehabilitation context, despite some issues that should be addressed to further improve the scale.

PubMed URL

http://www.ncbi.nlm.nih.gov/pubmed/29216914?dopt=Abstract

DOI10.1186/s12889-017-4945-9
Link to full texthttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5721585/pdf/12889_2017_Article_4945.pdf
Grant ListBEX 12456/13-6 / / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / United States
Edital nº06/2013 / / Ministério da Ciência, Tecnologia e Inovação (MCTI), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) e Ministério da Saúde - Rede Brasileira de Avaliação de Tecnologias em Saúde (REBRATS) / United States
Edital Universal nº 14/2013 / / Ministério da Ciência, Tecnologia e Inovação (MCTI), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / United States