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ABSTRACT: Background
The Personal Outcomes Scale (POS) is a scale developed to measure quality of life of adults (18+) with intellectual disability. Previous studies have reported good fit for Spanish and Portuguese language versions of POS.Aims
This study aimed to evaluate the factor structure of the English language version of POS when used to measure the quality of life of adults (18+) with intellectual disability in the UK.Materials and methods
Analysis was conducted on POS data from 310 adults with an intellectual disability. First and second order factor models and multi-level models were used to assess fit.Results
There was poor fit to the data for all tested models. We estimated that 23% of variance in POS scores was accounted for by interviewer cluster.Discussion
This was the first UK-based evaluation of POS and our data did not confirm the factor structure of the POS measure. The identification of systematic variability within the dataset indicates that inter-rater reliability is a potential limitation of the POS tool.Conclusion
Further research is needed to investigate inter-rater reliability of POS interviewers and to explore factor structure.
SUBMITTER: Buxton H
PROVIDER: S-EPMC10952361 | biostudies-literature | 2024 Mar
REPOSITORIES: biostudies-literature
Buxton Helen H Gomes Manuel M Gafoor Rafael R Taylor Zac Z Totsika Vaso V
Journal of applied research in intellectual disabilities : JARID 20240301 2
<h4>Background</h4>The Personal Outcomes Scale (POS) is a scale developed to measure quality of life of adults (18+) with intellectual disability. Previous studies have reported good fit for Spanish and Portuguese language versions of POS.<h4>Aims</h4>This study aimed to evaluate the factor structure of the English language version of POS when used to measure the quality of life of adults (18+) with intellectual disability in the UK.<h4>Materials and methods</h4>Analysis was conducted on POS dat ...[more]