ArticleSao Paulo medical journal = Revista paulista de medicina2023
Validation and calibration of the Food Consumption Frequency Questionnaire for pregnant women.
Article in Sao Paulo medical journal = Revista paulista de medicina, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed, 1 citations in OpenAlex.
- Food Frequency Questionnaires Validated in Brazil: A Scoping Review.Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2026Article
- Assessment of Maternal Dietary Intake, Physical Activity Status, and Body Composition During Pregnancy: A Cross-Sectional Study.Nursing reports (Pavia, Italy) · 2025Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFew food frequency questionnaires (FFQ) have been validated for pregnant women, particularly those in small- and medium-sized cities in different regions of Brazil.
objectivesTo validate and calibrate a semiquantitative FFQ for pregnant women. DESIGN AND
settingThe study was validated with a sample of 50 pregnant women (≥ 18 years) enrolled in Brazilian prenatal services.
methodsAn FFQ and a 24-hour recall were used to evaluate dietary intake. Dietary variables were tested for normality and log-converted when asymmetrical. Pearson's Correlation Coefficient was used to validate the questionnaire. Linear regression was applied to extract calibration factors. All variables underlying the consumption analysis were adjusted for energy.
resultsThe mean age of the pregnant women was 26 years ± 6.2 years; 58% were in their first trimester, and 30% were identified as overweight/obese. The Pearson correlation analysis results indicated that the FFQ overestimated energy and nutrient intake, whose coefficients ranged from -0.15 (monounsaturated fat) to 0.50 (carbohydrate). Adjusting for energy reduced the mean values of intake coefficients, which now ranged from -0.33 (sodium) to 0.96 (folate). The calibration analysis results indicated variation in the coefficients from -0.23 (sodium) to 1.00 (folate). Calibration produced satisfactory coefficients for the FFQ compared with the reference standard for energy, macronutrients, monounsaturated fat, cholesterol, vitamins B12/C, folate, sodium, iron, and calcium.
conclusionsAfter validating and calibrating tests, we observed that the FFQ was adequately accurate for assessing the food consumption of the pregnant women in this study.
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