Validity and reproducibility of a semi-quantitative food frequency questionnaire for use among Portuguese pregnant women.

Maternal & Child Nutrition
Elisabete PintoHenrique Barros

Abstract

This study aimed to evaluate the validity and reproducibility of a semi-quantitative food frequency questionnaire (FFQ) to estimate nutrient intake among Portuguese pregnant women. A sample of 101 pregnant women completed a 3-day food diary (FD) in each pregnancy trimester (reference method) and an interviewer-administered FFQ in the immediate post-partum period. Ranking women according to their usual intake showed that, on average, 65% were classified into the same +/-1 quintile and 2.4% into opposite quintiles by the two methods. Energy-adjusted and de-attenuated correlation coefficients ranged from 0.20 (protein) to 0.58 (riboflavin). Similar results were obtained when the FFQ was compared to each trimester-specific FD. To assess the FFQ reproducibility, 70 women in their third pregnancy trimester were interviewed twice within a 2-week interval. The level of agreement was high, with > or = 75% of the participants being classified into the same +/-1 quintile by the two administrations for 13 of the 15 nutrients examined. A review of the published literature revealed that this is the first FFQ to take the whole pregnancy as its reference time window. Our findings showed that a single administration of this FFQ in the immediate...Continue Reading

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Citations

Jun 6, 2008·Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·M SeveroH Barros
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Apr 7, 2017·The British Journal of Nutrition·Jing HuangCai-Xia Zhang
Jul 6, 2016·The British Journal of Nutrition·Yujin Lee, Kyong Park
Feb 8, 2014·The British Journal of Nutrition·Lian WangCai-Xia Zhang
Jun 13, 2017·Molecular Nutrition & Food Research·Jing HuangCai-Xia Zhang

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