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Deriving an overall appearance domain score by applying bifactor IRT analysis to the BODY-Q appearance scales.

ABSTRACT: PURPOSE: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. METHODS:In a bifactor model, questionnaire items load onto both a primary specific factors and a general factor, such as satisfaction with appearance. The international BODY-Q validation patient sample (n?=?734) was used to fit a bifactor model to the appearance domain. Factor loadings, fit indices, and correlation between bifactor appearance domain and satisfaction with body scale were assessed. RESULTS:All items loaded on the general factor of their corresponding domain. In the appearance domain, all items demonstrated adequate item fit to the model. All scales had satisfactory fit to the bifactor model (RMSEA 0.045, CFI 0.969, and TLI 0.964). The correlation between the appearance domain summary scores and satisfaction with body scale scores was found to be 0.77. DISCUSSION:We successfully applied a bifactor model to BODY-Q data with good item and model fit indices. With this method, we were able to produce reliable overall appearance scores which may improve the interpretability of the BODY-Q while increasing flexibility.

SUBMITTER: Geerards D

PROVIDER: S-EPMC7142051 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Deriving an overall appearance domain score by applying bifactor IRT analysis to the BODY-Q appearance scales.

Geerards Daan D van den Berg Lisa L Pusic Andrea L AL Hoogbergen Maarten M MM Klassen Anne F AF van der Hulst René R W J RRWJ Sidey-Gibbons Chris J CJ

Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation 20191122 4

<h4>Purpose</h4>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 f ...[more]

PMID: 31758485

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Project description:Purpose The fitness centers are settings for health promotion, yet may serve as a stage for counterproductive figure idealization. Such idealization may take the form of a drive toward the thin, the muscular, or lean body figure ideal, which all hold the potential to impel an experience of body appearance pressure (BAP) and body dissatisfaction. The aim of this study was to explore figure idealization, body dissatisfaction, and experience of BAP in fitness instructors. Materials and Methods Fitness instructors, 70 (23%) males and 236 (77%) females, were recruited through their facility chief executive officer and social media for a digital survey on mental health. Results are presented for body appreciation (BAS-2), body dissatisfaction (EDI-BD), drive for muscularity (DM), drive for leanness (DLS), questions on BAP, symptoms of eating disorders (EDE-q), and history of weight regulation and eating disorders (EDs). Results Attempts to gain body weight were reported by 17% of females and 53% of males, whereas ?76% of males and females, respectively, reported to have attempted weight reduction. Reasons for body weight manipulation were predominantly appearance related, and 10–20% reported disordered eating behavior. Mean BAS-2 and EDI-BD were acceptable, but 28% of females were above clinical cutoff in EDI-BD, and mean DLS were high in both sexes. In total, 8% of females were above clinical cutoff in EDE-q, which corresponded well with the self-reported ED. Approximately 90% of the sample perceived BAP to be a societal issue and reported predominantly customers and colleagues to be the cause of their personal experience of BAP. Fewer than 50% knew of any actions taken by their employer to reduce BAP. There were few differences according to profession or educational level. Conclusion Fitness instructors report BAP to affect them negatively, which may put them at risk of impaired mental health. Educational level did not protect against figure idealization and BAP. To care for their employees and to optimize their position as a public health promoter, the fitness industry should target BAP in health promotion programs.

Dataset Information

Deriving an overall appearance domain score by applying bifactor IRT analysis to the BODY-Q appearance scales.

Publications

Deriving an overall appearance domain score by applying bifactor IRT analysis to the BODY-Q appearance scales.

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