[Underreporting of energy intake and associated factors in a population-based study].

This study aimed to identify the prevalence of underreporting of energy intake and associated factors in a sample of 331 individuals from the population-based Health Survey in the City of São Paulo, Brazil. Energy intake was assessed by averaging two 24-hour recalls collected on nonconsecutive days. Total energy expenditure was calculated by the predictive equation, and under-reporters were defined as individuals with energy intake less than 2 standard deviations from the energy intake/predicted total energy expenditure ratio.