Abstract
Aims
To evaluate the psychometric properties of the male body dissatisfaction scale (MBDS) in Brazilian and Portuguese university students; to present a reduced model of the scale; to compare two methods of computing global scores for participants’ body dissatisfaction; and to estimate the prevalence of participants’ body dissatisfaction.
Methods
A total of 932 male students participated in this study. A confirmatory factor analysis (CFA) was used to assess the scale’s psychometric properties. Multi-group analysis was used to test transnational invariance and invariance in independent samples. The body dissatisfaction score was calculated using two methods (mean and matrix of weights in the CFA), which were compared. Finally, individuals were classified according to level of body dissatisfaction, using the best method.
Results
The MBDS model did not show adequate fit for the sample and was, therefore, refined. Thirteen items were excluded and two factors were combined. A reduced model of 12 items and 2 factors was proposed and shown to have adequate psychometric properties. There was a significant difference (p < 0.001) between the methods for calculating the score for body dissatisfaction, since the mean overestimated the scores. Among student participants, the prevalence of body dissatisfaction with musculature and general appearance was 11.2 and 5.3%, respectively.
Conclusions
The reduced bi-factorial model of the MBDS showed adequate validity, reliability, and transnational invariance and invariance in independent samples for Brazilian and Portuguese students. The new proposal for calculating the global score was able to more accurately show their body dissatisfaction.
No level of evidence Basic Science
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Acknowledgements
Thank you to the development agencies: Fundação de Amparo à Pesquisa do estado de São Paulo (FAPESP; 2014/03093-2, 2015/00228-7), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; 142315/2014-1) for providing the financial resources for this study. Thank you to the professors (Maria da Graça Vinagre, Célia Simão de Oliveira, Maria Costa, Afonso Cavaco, Filipa Costa, José Santos, and Maria Caramona) and students (Moema Santana, Bianca Martins, Fernanda Maurício, and Andreia Caldeira) who assisted in collecting the Brazilian and Portuguese data.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved in Brazil and Portugal by the Ethics Committees for Research Involving Human Beings (UNESP-CAAE 29896214.0.0000.5426, ESEL#1413).
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Informed consent was obtained from all individual participants included in the study.
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da Silva, W.R., Marôco, J., Ochner, C.N. et al. Male body dissatisfaction scale (MBDS): proposal for a reduced model. Eat Weight Disord 22, 515–525 (2017). https://doi.org/10.1007/s40519-017-0420-y
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DOI: https://doi.org/10.1007/s40519-017-0420-y