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  • Oral presentation
  • Open Access

Body image in idiopathic scoliosis: a comparison study of psychometric properties between four patient-reported outcome instruments

  • 1,
  • 2,
  • 2 and
  • 2
Scoliosis20149 (Suppl 1) :O74

https://doi.org/10.1186/1748-7161-9-S1-O74

  • Published:

Keywords

  • Body Image
  • Psychometric Property
  • Idiopathic Scoliosis
  • Cobb Angle
  • Assessment Instrument

Background

Four patient-reported outcome (PRO) instruments are used to assess body image in idiopathic scoliosis (IS): Quality of Life Profile for Spinal Deformities (QLPSD), SRS-22 Self Image scale, Spinal Appearance Questionnaire (SAQ), and Trunk Appearance Perception Scale (TAPS).

Aim

To compare the psychometric properties of these four assessment instruments.

Design: This is a cross-sectional study. Inclusion criteria were patients with IS, 10 to 40 years old, Cobb angle ≥25°, without previous surgical treatment..

Methods

80 patients (mean age 20.3 years) were included. The four instruments in a Spanish version were administered. In addition, full-spine x-ray was obtained. Sample was stratified into two groups according to Cobb angle (less and more than 45º). Psychometric properties studied included internal consistency, convergent (correlation between self-image scales and Cobb angle) and divergent validity (correlations with Health Related Quality of Life domains: function, pain, mental health, measured through SRS-22).

Results

All the PRO instruments presented high internal consistency (QLPSD Body Image, α=0.80; SRS-22 Image, α=0.78; SAQ, α=0.89; TAPS, α=0.87).Pictorial scales showed higher correlations with Cobb angle (SAQ Appearance r=0.61 and TAPS r=-0.62) than textual scales (QLPSD-bi (r=0.36; SRS-22 Self-Image r=-0.41).The four image scales showed significant correlations with other HRQL SRS22 dimensions (from r=-.2 to 0.7).

Conclusions

All four instruments have good psychometric properties. To evaluate patients with IS is advisable to add pictorial image perception scales to HRQL assessment instruments.

Authors’ Affiliations

(1)
Fundacion Hospital Vall Hebron, Barcelona, Spain
(2)
Hospital Vall Hebron, Barcelona, Spain

Copyright

© DAgata et al; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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