Patient perceptions of foot disability in Juvenile Idiopathic Arthritis: a comparison of the juvenile arthritis foot disability index and the Oxford ankle foot questionnaire for children

Article


Ferrari, J. 2015. Patient perceptions of foot disability in Juvenile Idiopathic Arthritis: a comparison of the juvenile arthritis foot disability index and the Oxford ankle foot questionnaire for children. Journal of Foot and Ankle Research. 8 (50).
AuthorsFerrari, J.
Abstract

Background: The Juvenile Arthritis Foot Disability Index (JAFI) and the Oxford Ankle Foot Questionnaire for
Children (OxAFQ-C) are two region-specific paediatric outcome tools that measure the impact on well-being in
children with foot pathology. The aim of this study was to establish the level of agreement between the JAFI and
the OxAFQ-C in a group of children diagnosed with Juvenile Idiopathic Arthritis (JIA).
Methods: Children with JIA accessed the questionnaire via a website. The OxAFQ-C questionnaire and the JAFI
questionnaire were combined into one document consisting of 42 statements with Likert-scale responses. A further
question regarding duration of disease was added. On completion, the web-linked questionnaire was returned by
e-mail.
Results: Thirty five participants were included. Individual domain and composite score analysis was undertaken. The
JAFI participation domain was compared to the OxAFQ-C school domain and showed no significant difference
between the median scores of each participant (z = -1.33, p = 0.181). The JAFI activity and the OxAFQ-C physical
domains were compared and showed that a significant difference between the median scores existed (z = -4.29,
p < 0.001). Agreement between the two PROMs was tested using Bland Altman Levels of Agreement based upon
the percentage summed composite scores. Levels of agreement between the scores were considered to be poor
based on the Bland Altman plot, despite a lowmean difference in scores (mean difference = -3.88, SD of difference = 9.93,
p = 0.027). Pearson correlation was undertaken to measure the relationship between the summed composite score and
disease duration. No relationship was found (JAFI: r = -0.08, p = 0.672; OxAFQ-C: r = 0.037, p = 0.871).
Conclusions: This study has shown that despite some agreement between the individual domains, overall there is poor
agreement between the OxAFQ-C and the JAFI percentage summed composite scores. The study is not able to
determine if one score is superior to the other but both scores could be of value when used in this population.

JournalJournal of Foot and Ankle Research
Journal citation8 (50)
ISSN1757-1146
Year2015
PublisherBioMed Central
Accepted author manuscript
License
CC BY
Web address (URL)http://dx.doi.org/10.1186/s13047-015-0106-5
Publication dates
Print10 Sep 2015
Publication process dates
Deposited15 Sep 2015
Accepted23 Aug 2015
Copyright information© 2015 The author.
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