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This study focuses on the mediator role of social comparison in the relationship between perceived breach of psychological contract and burnout. A previous model showing the hypothesized effects of perceived breach on burnout, both direct and mediated, is proposed. The final model reached an optimal fit to the data and was confirmed through multigroup(More)
BACKGROUND The high prevalence of childhood overweight and obesity is a health problem worldwide. In developing countries, we lack information on the extent of the problem and the risk factors involved. OBJECTIVE To determine the prevalence rates of overweight and obesity and of abdominal obesity, and their relationship with physical activity, poverty,(More)
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