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| Author(s): |
Thaís de Oliveira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Ribeirão Preto. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina de Ribeirão Preto (PCARP/BC) |
| Defense date: | 2010-05-24 |
| Examining board members: |
Daniela Saes Sartorelli;
Rosa Wanda Diez Garcia;
Rosely Sichieri
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| Advisor: | Daniela Saes Sartorelli |
| Abstract | |
Objective: To design a quantitative food frequency questionnaire for pregnant women attended by the Brazilian National Health Service in Ribeirão Preto, SP. Methods: Data were obtained from June to October of 2008. A 24-hour food recall was obtained from 150 women, 50 in each trimester of pregnancy, aged 18-35 years. A second food recall was obtained from 90 women, 30 in each trimester of pregnancy, from 7 to 15 days after the first dietary assessment. The development of the food list was based on the contribution to the total population intake of relevant nutrients by each food item. The portion sizes were determined according to percentiles of intake of each food item, and P50 corresponded to the reference portion (medium), and small, large and extra-large to P25, P75 and P100, respectively. Data were adjusted for energy intake and within-subject variance. Chi-square, ANOVA, Tuckey and Kruskal-Wallis were used to investigate differences according to gestational age. Nutwin and SPSS software were used for the analysis of dietary intake and statistics, respectively. P < 0.05 was taking as significant. Results: Totally, 305 foods and preparations were reported on the food recalls, and grouped into 112 items according to similarity in nutrient content per usual serving size. Distinct food items were reported on food recalls according to gestational age, and differences for the estimative of nutrient intakes were found. For portion sizes, differences were found for tomato and candies made with milk and sugar. The food frequency questionnaire was designed with 85 items, which represented 96% of the macronutrient intake and from 74,2 to 98,8% of other nutrients of interest. Conclusions: The food frequency questionnaire has a reasonable number of food items, which represented the mainly sources of nutrients of interest for pregnancy. This is the first food frequency questionnaire designed for Brazilian pregnant women. Investigations of the accuracy and precision of the questionnaire are being carried out. (AU) | |