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Journal of Obesity
Volume 2014, Article ID 684919, 9 pages
Research Article

Predictors of Quality of Life in Portuguese Obese Patients: A Structural Equation Modeling Application

1Polytechnic Institute of Cávado and Ave, 4750-810 Barcelos, Portugal
2ICBAS, University of Porto, 4050-313 Porto, Portugal
3ISPUP, Institute of Public Health, University of Porto, 4050-600 Porto, Portugal
4Faculty of Psychology and Educational Sciences, University of Porto, 4200-135 Porto, Portugal
5UIPES, 1140-041 Lisbon, Portugal
6University of Fernando Pessoa, 4249-004 Porto, Portugal
7UMIB/ICBAS and Hospital Santo António/CHP, 4099-001 Porto, Portugal

Received 5 October 2013; Revised 23 December 2013; Accepted 24 December 2013; Published 16 February 2014

Academic Editor: Terry Huang

Copyright © 2014 Estela Vilhena et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Living with obesity is an experience that may affect multiple aspects of an individual’s life. Obesity is considered a relevant public health problem in modern societies. To determine the comparative efficacy of different treatments and to assess their impact on patients’ everyday life, it is important to identify factors that are relevant to the quality of life of obese patients. The present study aims to evaluate, in Portuguese obese patients, the simultaneous impact of several psychosocial factors on quality of life. This study also explores the mediating role of stigma in the relationship between positive/negative affect and quality of life. A sample of 215 obese patients selected from the main hospitals in Portugal completed self-report questionnaires to assess sociodemographic, clinical, psychosocial, and quality of life variables. Data were analysed using structural equation modeling. The model fitted the data reasonably well, CFI = 0.9, RMSEA = 0.06. More enthusiastic and more active patients had a better quality of life. Those who reflect lower perception of stigma had a better physical and mental health. Partial mediation effects of stigma between positive affect and mental health and between negative affect and physical health were found. The stigma is pervasive and causes consequences for psychological and physical health.