Exploring the psychometric properties of the Intellectual Disability versions of the Short Warwick-Edinburgh Mental Wellbeing Scale and Kidscreen10, self-reported by adolescents with intellectual disability.

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Abstract

Background: There are no validated self-report measures that can be used to assess health and wellbeing in adolescents with intellectual disability (ID). Method: The aim of this study was to explore the psychometric properties of two newly adapted self-report health-related quality of life (HRQoL) and mental wellbeing measures: the Intellectual Disability versions of the Short Warwick–Edinburgh Mental Wellbeing Scale (ID-SWEMWBS) and Kidscreen10 (ID-Kidscreen10). For this, we used data from a sample of 427 adolescents (aged 11–19) with ID recruited from special school settings. Results: Confirmatory factor analysis (CFA) was conducted to validate the factor structure of both measures. Internal consistency was assessed using Cronbach's alpha and test–retest reliability was analysed using intra-class correlation coefficients. The internal consistency measured using Cronbach's alpha was found to be in the range of 0.70–0.78, test–retest reliabilities were expressed using intra-class correlation coefficients that were found to be high for both measures (ID-SWEMWBS, 0.758; ID-Kidscreen10, 0.723), and the CFA supported the unidimensional structure of both measures. Conclusions: The results of this study indicate that the ID-SWEMWBS and ID-Kidscreen10 have very good psychometric properties and can be used as self-report measures to assess HRQoL and mental wellbeing in adolescents with ID.

Original languageEnglish
Pages (from-to)415-426
Number of pages12
JournalJournal of Intellectual Disability Research
Volume67
Issue number5
Early online date13 Feb 2023
DOIs
Publication statusPublished (in print/issue) - 31 May 2023

Bibliographical note

Funding Information:
This work was supported by The Baily Thomas Charitable Fund, United Kingdom (Grant Number: TRUST/VC/AC/SG/5662‐8764).

Publisher Copyright:
© 2023 The Authors. Journal of Intellectual Disability Research published by MENCAP and International Association of the Scientific Study of Intellectual and Developmental Disabilities and John Wiley & Sons Ltd.

Keywords

  • Psychometric properties
  • self-report
  • adolescent
  • intellectual disability
  • mental wellbeing
  • Health-related Quality Of Life
  • Health-related quality of life
  • Intellectual disability
  • Mental wellbeing
  • Adolescent
  • Self-report

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