The adiposity and clinical staging of patients were associated with oxidative stress. The oxidative and antioxidant biomarkers showed a negative correlation in patients with breast cancer.
Objective To assess the association between dietary glycemic index (GI) and excess weight in pregnant women in the first trimester of pregnancy.
Methods A cross-sectional study in a sample of 217 pregnant women was conducted at the maternal-fetal outpatient clinic of the Hospital Geral de Fortaleza, Fortaleza, state of Ceará, Brazil, for routine ultrasound examinations in the period between 11 and 13 weeks + 6 days of gestation. Weight and height were measured and the gestational body mass index (BMI) was calculated. The women were questioned about their usual body weight prior to the gestation, considering the prepregnancy weight. The dietary GI and the glycemic load (GL) of their diets were calculated and split into tertiles. Analysis of variance (ANOVA) or Kruskal-Walls and chi-squared (χ2) statistical tests were employed. A crude logistic regression model and a model adjusted for confounding variables known to influence biological outcomes were constructed. A p-value < 0.05 was considered significant for all tests employed.
Results The sample group presented a high percentage of prepregnancy and gestational overweight (39.7% and 40.1%, respectively). In the tertile with the higher GI value, there was a lower dietary intake of total fibers (p = 0.005) and of soluble fibers (p = 0.008). In the third tertile, the dietary GI was associated with overweight in pregnant women in the first trimester of gestation, both in the crude model and in the model adjusted for age, total energy intake, and saturated fatty acids. However, this association was not observed in relation to the GL.
Conclusion A high dietary GI was associated with excess weight in women in the first trimester of pregnancy.
Gerais em Nutrição. A confiabilidade interna e a estabilidade apresentaram valores de alfa de Cronbach e coeficiente de correlação intraclasse (CCI) acima de 0,7 em todas as seções e no total, exceto na seção 1, cujos valores foram 0,64 e 0,56, respectivamente. Não houve diferenças entre as médias das pontuações no teste e no reteste no total e em todas as seções. O grau de concordância dos escores obtidos no teste e reteste apresentou Kappa ponderado de 0,85. O diagrama de Bland e Altman mostrou a dispersão das médias dentro dos limites superior e inferior. A pontuação média dos escores dos alunos de nutrição foi superior ao dos estudantes de engenharia em todas as seções e no total, confirmando, portanto, a validade do constructo. A pontuação foi maior para o sexo feminino, para os estudantes que se declararam com bom estado de saúde e para os com idade superior a 30 anos. Conclusão: O instrumento General Nutrition Knowledge Questionnaire-Revised foi traduzido e adaptado para o português brasileiro, respeitando todas as etapas de adaptação transcultural. A avaliação psicométrica da versão brasileira apresentou valores adequados de confiabilidade e validade. Portanto, o Questionário de Conhecimentos Gerais em Nutrição é uma ferramenta validada para a avaliação do conhecimento nutricional de adultos no Brasil.
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