Open AccessDeriving an overall appearance domain score by applying bifactor IRT analysis to the BODY-Q appearance scales
Author(s) -
Daan Geerards,
Lisa van den Berg,
Andrea L. Pusic,
Maarten M. Hoogbergen,
Anne F. Klassen,
René R W J van der Hulst,
Chris SideyGibbons
Publication year - 2019
Publication title -
quality of life research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 145
eISSN - 1573-2649
pISSN - 0962-9343
DOI - 10.1007/s11136-019-02366-8
Subject(s) - interpretability , correlation , statistics , scale (ratio) , psychology , item response theory , psychometrics , clinical psychology , mathematics , artificial intelligence , computer science , physics , geometry , quantum mechanics
With the BODY-Q, one can assess outcomes, such as satisfaction with appearance, in weight loss and body contouring patients using multiple scales. All scales can be used independently in any given combination or order. Currently, the BODY-Q cannot provide overall appearance scores across scales that measure a similar super-ordinate construct (i.e., overall appearance), which could improve the scales' usefulness as a benchmarking tool and improve the comprehensibility of patient feedback. We explored the possibility of establishing overall appearance scores, by applying a bifactor model to the BODY-Q appearance scales.