Validation of a food-frequency questionnaire for use in pregnancy

Mouratidou, Theodora; Ford, Fiona; Fraser, Robert

doi:10.1079/phn2005876

Cited by 70 publications

(109 citation statements)

References 26 publications

(13 reference statements)

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“…For example, correlations of measured total energy intake in our obese group were r P 5 0?284/r S 5 0?334 and in our lean group were r P 5 0?462/r S 5 0?510; compared with previous reports of r S 5 0?27 (17) , r P 5 0?26 (28) , r P 5 0?24 (18) and r S 5 0?28 (19) in pregnant women (where r P is Pearson correlation, r S is Spearman correlation). The reasons for closer correlation in our lean women are unknown, but may reflect that this was a group of lean women who had consented to participate in a study of obesity in pregnancy, and so were well motivated and interested in health behaviour and weight in pregnancy.…”

Section: Discussioncontrasting

confidence: 63%

“…Significant agreement was also seen for important nutrients such as Ca, Fe, vitamins E, B 6 , B 12 and C, and also for SFA, dietary cholesterol and sugars, in both our obese and lean groups, as observed by others (19) . However, correlations for energy-adjusted dietary fibre were poorer in the obese group (r P 5 0?044/r S 5 20?183) than the lean group (r P 5 0?377/r S 5 20?294), as well as other studies (r P 5 0?36-0?47 (28) and r P 5 0?56 (18) ). This suggests possible over-reporting of portion size/frequency of dietary fibre intake in the FFQ as opposed to underreporting in the FD; it has been reported that fruits and vegetables are perceived as healthy and are more likely to be over-reported in FFQ (29) .…”

Section: Discussionsupporting

confidence: 59%

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Evaluation of an FFQ to assess total energy and nutrient intakes in severely obese pregnant women

Mohd-Shukri¹,

Bolton²,

Norman³

et al. 2012

Public Health Nutr.

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Objective: FFQ are popular instruments for assessing dietary intakes in epidemiological studies but have not been validated for use in severely obese pregnancy. The aim of the present study was to compare nutrient intakes assessed by an FFQ with those obtained from a food diary among severely obese pregnant women. Design: Comparison of an FFQ containing 170 food items and a food diary for 4 d (three weekdays and one weekend day); absolute agreement was assessed using the paired t test and relative agreement by Pearson/Spearman correlation, crossclassification into tertiles and weighted kappa values. Setting: Antenatal metabolic clinic for severely obese women. Subjects: Thirty-one severely obese (BMI at booking $40?0 kg/m 2 ) and thirty-two lean control (BMI 5 20?0-24?9 kg/m 2 ) pregnant women. Results: The findings showed that nutrient intakes estimated by the FFQ were significantly higher than those from the food diary; average correlation was 0?32 in obese and 0?43 in lean women. A mean of 48?5 % of obese and 47?3 % of lean women were correctly classified, while 12?9 % (obese) and 10?0 % (lean) were grossly misclassified. Weighted k values ranged from 20?04 to 0?79 in obese women and from 0?16 to 0?78 in lean women. Conclusions: Overall, the relative agreement between the FFQ and food diary was lower in the obese group than in the lean group, but was comparable with earlier studies conducted in pregnant women. The validity assessments suggest that the FFQ is a useful tool for ranking severely obese pregnant women according to the levels of their dietary intake. Keywords FFQ ValidationObesity Pregnancy Extra dietary energy is required during pregnancy to compensate for the deposition of maternal and fetal tissues and the increase in BMR (1) . However, with recent data indicating that up to a quarter of adult women are now classified as obese in the UK (2) , including in Scotland (3) , the prominent nutritional problem faced by pregnant women in developed countries is overnutrition, including pre-pregnancy overweight/obesity and excessive weight gain during pregnancy. Maternal obesity is associated with detrimental effects in both mothers and offspring. Obese mothers are at higher risk of developing pregnancy complications such as gestational diabetes, pre-eclampsia and having large-for-gestational-age babies (4) . Therefore, evaluation of dietary intake in this population is important.The FFQ is a popular instrument for assessing dietary intakes in epidemiological studies, mostly because it is relatively inexpensive and does not place a heavy burden on either the respondent or research staff. The FFQ also allows collection of information on usual or average food intake over an extended period, thus reflecting habitual intake, rather than a snapshot of a few days' diet (5,6) . Therefore FFQ have been used to investigate the nutritional status of pregnant women (7)(8)(9)(10)(11)(12)(13) , but not severely obese pregnant women.There are, however, some limitations in the use of the FFQ to estimate food int...

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Section: Discussioncontrasting

confidence: 63%

Section: Discussionsupporting

confidence: 59%

Evaluation of an FFQ to assess total energy and nutrient intakes in severely obese pregnant women

Mohd-Shukri¹,

Bolton²,

Norman³

et al. 2012

Public Health Nutr.

View full text Add to dashboard Cite

show abstract

“…the FFQ. Although validity of the information collected by FFQ has been shown by many validation studies (9,10) , this information is not as detailed as that collected by dietary records because it involves a recall bias (32) . It has been reported that the FFQ has a tendency of overestimate when there are many food items, and underestimate when there are few food items, compared with a dietary record (32) .…”

Section: Discussionmentioning

confidence: 99%

Assessment of exposure to methylmercury in pregnant Japanese women by FFQ

Yaginuma-Sakurai

Shimada

Ohba

et al. 2009

Public Health Nutr.

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Objective: To examine whether an FFQ can be used for assessing exposure to methylmercury (MeHg) by estimating MeHg intake from seafood consumption using the FFQ and confirming the accuracy of the estimated value. Design: Seafood consumption of pregnant women was assessed using the FFQ. Total mercury (T-Hg) concentrations of maternal red blood cells (RBC) and hair were measured as exposure indices of MeHg. Setting: A prospective birth cohort study, the Tohoku Study of Child Development (TSCD), which has been ongoing since 2001. Subjects: The subjects were 609 pregnant Japanese women who were enrolled in the TSCD. Results: MeHg intake was estimated from seafood consumption determined using the FFQ and the MeHg concentrations in each type of seafood. The accuracy of the estimated value was confirmed by comparison with T-Hg in RBC and hair. Estimated MeHg intake was 42?3 mg/week, and 43?0 % of that was from large predatory fish. Compared with the Japanese tolerable weekly intake, in total 12?5 % of the subjects exceeded it. T-Hg concentrations in RBC and hair were significantly correlated with estimated MeHg intake: r 5 0?325 (P , 0?0001) for RBC and r 5 0?305 (P , 0?0001) for hair. Conclusions: Estimated MeHg intake based on the FFQ was significantly associated with T-Hg concentrations in RBC and hair. Although the estimated value involves uncertainties, the FFQ appears to be a useful tool for assessment of exposure to MeHg.

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“…Isso é corroborado pelos gráficos de dispersão, que mostraram aumento na magnitude do viés à medida em que aumentou a ingestão. Essa característica também tem sido observada em outros estudos 26,39 . Esses resultados reforçam a necessidade de diferentes abordagens para testar a validade de um QFA 9,27 .…”

Section: Energia E Nutrientesunclassified

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

et al. 2014

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Este estudo testou reprodutibilidade e validade relativa, e estimou fatores de calibração de um QFA (questionário de frequência alimentar) com 120 itens alimentares, em 128 adultos. Aplicou-se um QFA e três inquéritos recordatórios de 24hs (IR24h). A validade foi testada pelo método de Bland-Altman, correlação intraclasse (CCI), classificação em quartos de ingestão e kappa ponderado. Os fatores de calibração foram estimados por meio de regressão linear, com os valores de ingestão alimentar do IR24h como variável dependente e os valores do QFA como variável independente. O QFA subestimou a ingestão da maioria dos nutrientes em relação ao IR24h. O CCI corrigido para energia e deatenuado variou de 0,19 (zinco) a 0,82 (cálcio). Trinta e sete por cento dos indivíduos foram classificados no mesmo quarto, com valor médio de kappa de 0,28 (zinco: 0,08; cálcio: 0,49). Os maiores fatores de calibração foram 0,48 (cálcio), 0,47 (potássio) e 0,44 (carboidratos), e o menor fator foi 0,10 (retinol). Esse QFA demonstrou validade relativa satisfatória e valores de ingestão de energia e nutrientes calibrados semelhantes ao IR24h.

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Validation of a food-frequency questionnaire for use in pregnancy

Cited by 70 publications

References 26 publications

Evaluation of an FFQ to assess total energy and nutrient intakes in severely obese pregnant women

Evaluation of an FFQ to assess total energy and nutrient intakes in severely obese pregnant women

Assessment of exposure to methylmercury in pregnant Japanese women by FFQ

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

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