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Pediatric Rheumatology
Published in: Pediatric Rheumatology 1/2016

Open Access 01-12-2016 | Research article

Application of Rasch analysis to the parent adherence report questionnaire in juvenile idiopathic arthritis

Authors: Karine Toupin April, Johanne Higgins, Debbie Ehrmann Feldman

Published in: Pediatric Rheumatology | Issue 1/2016

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Abstract

Background

Adherence to treatment in children with juvenile idiopathic arthritis (JIA) is associated with better outcomes. Assessing patient adherence in JIA, as well as attitudes and beliefs about prescribed treatments, is important for the clinician in order to optimize patient management. The objective of the current study was to evaluate the psychometric properties of the Parent (proxy-report) Adherence Report Questionnaires (PARQ), which assesses beliefs and behaviors related to adherence to treatments prescribed for JIA.

Methods

A Rasch analysis was conducted on data collected with parents of children with JIA from two studies in which the PARQ was used as a measure of adherence.

Results

The PARQ showed preliminary evidence of multidimensionality with two factors, accounting for 38 % and 27 % of the variance respectively. The PARQ in its original version does not adhere to expectations of the Rasch model. A transformed version of the PARQ obtained by deletion of the general adherence scale and modification of visual analog scales into 5-point likert scales improved fit to the model and showed preliminary evidence of unidimensionality.

Conclusions

The PARQ was transformed based on the results of the Rasch analysis. The transformed version of the PARQ shows preliminary evidence of unidimensionality and may allow computation of a total score, although further testing is needed to verify these findings.
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Metadata
Title
Application of Rasch analysis to the parent adherence report questionnaire in juvenile idiopathic arthritis
Authors
Karine Toupin April
Johanne Higgins
Debbie Ehrmann Feldman
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Pediatric Rheumatology / Issue 1/2016
Electronic ISSN: 1546-0096
DOI
https://doi.org/10.1186/s12969-016-0105-5

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