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BackgroundLow calcium:phosphorus ratios (Ca:P ratio) in habitual diet have been observed worldwide, and it has been shown to be harmful to the bone health of the population. However, no study associating this ratio with obesity was found. Thus, considering that the intake of calcium and phosphorus will generate a ratio between them, which may be associated with obesity, this research seeks at evaluating the relation between obesity and the Ca:P ratio in the habitual diet of adults.MethodsCross-sectional population-based epidemiological study with stratified and systematic sampling. The sample was composed of 506 adults, aged between 18 and 60 years, of both genders. Information on socioeconomic and demographic conditions was obtained through questionnaires completed during home visits, where anthropometric and dietary evaluations were also conducted.ResultsIn the habitual diet consumed by the study subjects, a Ca:P ratio above the median of 0.57 reduced the risk of central obesity based on waist-to-height ratio (WHtR) (OR: 0.61; 95% CI: 0.41 – 0.92). Habitual dietary intake of calcium (OR: 0.65; 95% CI: 0.43 – 0.97) and dairy products (OR: 0.56; 95% CI: 0.37 – 0.84) above the median value (485.4 mg and 0.9 servings, respectively) was found to be a protective factor related to central obesity based on WHtR.ConclusionsValues above the median for the Ca:P ratio found in the habitual diet were negatively associated with central obesity based on WHtR. In addition, calcium and dairy consumption were negatively associated with central obesity based on WHtR. Therefore, higher Ca:P ratios contributed to a lower prevalence of central obesity.

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A obesidade é um problema nutricional complexo, com dimensões sociais e psicológicas, que afeta indivíduos de todas as idades. Além de apresentar fatores de risco para algumas doenças, pode interferir na qualidade de vida do idoso. Este estudo exploratório de natureza qualitativa investigou o discurso de idosas obesas quanto à participação em um programa de intervenção nutricional associado à atividade física. Participaram da pesquisa dezoito idosas obesas, inseridas em Centros de Referência e Cidadania do município de João Pessoa (PB). Para a coleta de dados, foi utilizada a técnica da entrevista a partir de um roteiro que contemplou a questão norteadora pertinente ao objetivo da investigação. Os dados obtidos foram analisados mediante a técnica de discurso do sujeito coletivo (DSC). Do DSC emergiram as seguintes ideias centrais: mudanças no estilo de vida, no hábito alimentar, na saúde e na autoestima. As ideias centrais refletem a valorização do referido programa para a promoção da saúde do grupo de idosas participantes do estudo. Espera-se que esta proposta possa subsidiar novas investigações na área da saúde do idoso.