Validação de um questionário quantitativo de frequência alimentar desenvolvido para universitários

Validou-se um Questionário Quantitativo de Frequência Alimentar em 50 graduandos em Saúde de São Paulo, Brasil. Considerou-se o registro alimentar de 3 dias como referência e variáveis energia, macronutrientes e fibras alimentares. A concordância entre o Questionário Quantitativo de Frequência Alimentar e a média dos registros alimentares de 3 dias foi avaliada pela estatística kappa, pelo coeficiente de correlação intraclasse (ICC) e percentual de concordância. Os limites de concordância foram examinados pelos gráficos de Bland-Altman. Melhores valores de coeficiente de correlação intraclasse foram encontrados para calorias (ICC 0,43; IC95% 0,17 – 0,63) e para nutrientes não ajustados por calorias, com exceção das fibras (ICC 0,34; IC95% 0,07 – 0,56). O percentual de concordância mostrou uma minoria classificada em terços opostos (16%) e aproximadamente metade classificada no mesmo terço (49.8%). Houve tendência à superestimação nos dados do Questionário Quantitativo de Frequência Alimentar para calorias e nutrientes, exceto gorduras. Recomenda-se a utilização deste instrumento em população universitária em estudos que visem à estimativa de calorias, bem como à classificação dos indivíduos em categorias de consumo.A validity test of a Food Frequency Questionnaire was carried out using 50 students of health occupation in São Paulo, Brazil. Therefore, a three day dietary record was used as reference method and variables such as energy, macronutrients and dietary fiber were analyzed. The accordance between the Food Frequency Questionnaire and average data from dietary record was tested with kappa statistics and intra-class correlation coefficients (ICC). Limits of agreement were estimated by the Bland-Altman's method. Better results were found for calories (ICC 0.43; 95%CI 0.17 - 0.63) and non-energy-adjusted nutrients, except dietary fiber (ICC 0.34; 95%CI 0.07 - 0.56). The percentage of individuals classified in the same category of consumption was nearly half (49.8%), while only 16% of them were classified in opposite categories. With the exception of lipids, other analyzed variables tended to be overestimated by the Food Frequency Questionnaire. The Food Frequency Questionnaire is recommended as a method of assessing food intake of university students in studies which focuson calorie estimates and also intend to classify groups into intake categories

Influência da orientação nutricional nas práticas de alimentação complementar em lactentes

The objective of the present study was to evaluate the effectiveness of nutritional guidance to lactating infants undergoing the phase of complementary feeding introduction and to verify the association of food practices with age and maternal education. It is a descriptive historical cohort study in which secondary data were evaluated from 92 lactating infants who had at least 3 nutritional counselings at the "Center for Promotion and Support of Breastfeeding" from the Federal University of Sao Paulo (UNIFESP), between October 2005 and March 2010. The information of food consumption was obtained from 24 hours food records which were qualitatively analyzed according to the presence of food groups (cereals/tubers, beef/egg, legumes, fruits/vegetables). The nutritional guidance for the introduction of the complementary food was based on the 10 Steps of a Healthy Diet for Brazilian Children under 2 years of age from the Health Ministry. For the Block Non-parametric Variance Analyses children were separated in 2 groups (Lac A = those who were already on a supplementary feeding; Lac B = those who were not on a supplementary feeding). The means and standard deviations of the number of food groups consumed at moments 0,1 and 2 for Lac A were 2.3 (SD = 0.8); 2.9 (SD = 0.8) and 3.2 (SD = 0.6), respectively. For Lac B at times 1 and 2 were 2.6 (SD = 0.9) and 3.1 (SD = 0.7), respectively. There was a statistic increase of the food groups with time for Lac A (moments 0 - 1 (p = 0.001), 0 - 2 (p < 0.001), 1 - 2 (p = 0.033)) and Lac B (moments 1 - 2 (p < 0.001)). Among the inadequate offered foods, those which had reduction were sugar (from 22.2% to 8.7%) and "petit suisse" cheese (from 11.1% to 4.3%). No relation between the presence of food groups and age and maternal education was observed. The nutritional orientation over time was effective what resulted in a better quality of the complementary feeding, independent of age and maternal education.Avaliar a efetividade da orientação nutricional de lactentes em fase de introdução da alimentação complementar e verificar a associação das práticas alimentares com idade e escolaridade materna. Estudo de coorte histórica descritiva, avaliando-se dados secundários de 92 lactentes que realizaram pelo menos três consultas nutricionais, atendidos no Centro de Incentivo e Apoio ao Aleitamento Materno da Universidade Federal de São Paulo, no período de outubro de 2005 a março de 2010. As informações de consumo alimentar foram obtidas a partir dos Recordatórios Alimentares de 24 horas, analisados qualitativamente segundo a presença dos grupos alimentares (cereais/tubérculos, carnes/ovos, leguminosas, frutas/legumes/verduras). A orientação nutricional para a introdução da alimentação complementar foi baseada nos Dez Passos da Alimentação Saudável para Crianças Brasileiras Menores de Dois Anos, do Ministério da Saúde. Para a análise de variância em blocos não paramétrica separaram-se as crianças em dois grupos (grupo Lac A= que já recebiam alimentação complementar e grupo Lac B = que ainda não recebiam alimentação complementar). As médias e desvios-padrão do número de grupos alimentares consumidos nos momentos 0, 1 e 2 para o Lac A foram 2,3 (dp = 0,8), 2,9 (dp = 0,8) e 3,2 (dp = 0,6), respectivamente, enquanto que para o Lac B nos momentos 1 e 2 foram 2,6 (dp = 0,9) e 3,1 (dp = 0,7), respectivamente. Estatisticamente houve um aumento significativo dos grupos alimentares com o tempo para o Lac A (momentos 0 - 1 (p = 0,001), 0 - 2 (

Validation of a quantitative food frequency questionnaire developed to under graduate students

A validity test of a Food Frequency Questionnaire was carried out using 50 students of health occupation in S&#227;o Paulo, Brazil. Therefore, a three day dietary record was used as reference method and variables such as energy, macronutrients and dietary fiber were analyzed. The accordance between the Food Frequency Questionnaire and average data from dietary record was tested with kappa statistics and intra-class correlation coefficients (ICC). Limits of agreement were estimated by the Bland-Altman's method. Better results were found for calories (ICC 0.43; 95%CI 0.17 - 0.63) and non-energy-adjusted nutrients, except dietary fiber (ICC 0.34; 95%CI 0.07 - 0.56). The percentage of individuals classified in the same category of consumption was nearly half (49.8%), while only 16% of them were classified in opposite categories. With the exception of lipids, other analyzed variables tended to be overestimated by the Food Frequency Questionnaire. The Food Frequency Questionnaire is recommended as a method of assessing food intake of university students in studies which focuson calorie estimates and also intend to classify groups into intake categories