Validity and reproducibility of a web-based, self-administered food frequency questionnaire

Mè, Labonté; A, Cyr; Baril‐Gravel, Lisa; Mm, Royer; Lamarche, Benoı̂t

doi:10.1038/ejcn.2011.163

Cited by 142 publications

(163 citation statements)

References 29 publications

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“…Correlations observed between these two assessment tools were within the ranges noted by other investigators, from 0?27 to 0?71 for vitamin C (33)(34)(35)(36)(37) , from 0?33 to 0?75 for vitamin E (38)(39)(40) and from 0?14 to 0?38 for total carotenoids and respective subclasses (41,42) . Additionally, since the correlation analysis for testing validity has been questioned for its failure in measuring agreement (30,43) , Bland-Altman plots and cross-classification were used in the present study to bridge this gap (44) . Bland-Altman plots did not show any systematic bias.…”

Section: Discussionmentioning

confidence: 99%

Validation of an FFQ to assess antioxidant intake in overweight postmenopausal women

Yang

Wáng

Davis

et al. 2013

Public Health Nutr.

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Objective: To validate an FFQ to assess antioxidant intake in overweight postmenopausal women. Design: A seventy-four-item antioxidant 1-month FFQ was developed based on major antioxidant sources in the American diet. Forty overweight postmenopausal women participated in a 9-month observational study and completed four sets of FFQ and 7 d food record (7dFR) every 3 months. Twelve-hour fasting blood was collected for plasma antioxidant measurement at the first visit. Setting: Connecticut, USA. Subjects: Forty overweight postmenopausal women. Results: Spearman correlation coefficients of 1-month antioxidant intake estimated from the first set of FFQ and 7dFR ranged from 0?34 to 0?87, except for g-tocopherol.The proportion of participants categorized into the extremely opposite tertiles averaged 7 %. Significant correlations were observed for diet-plasma vitamin C, a-tocopherol and carotenoids (P , 0?05). No time effect was observed on the dietary antioxidant intakes estimated from four 7dFR and four FFQ. Dietary antioxidants estimated from averaged four 7dFR showed moderate to high correlation with those estimated from averaged four FFQ and from each FFQ collected every 3 months. Bland-Altman plots did not show any systematic bias. Averaged misclassifications were below 10 % between these two instruments. Conclusions: These findings attested a reasonable validity and a good acceptance of this 1-month FFQ in assessing both short-term and long-term diverse antioxidant intakes in these overweight postmenopausal women. The use of this FFQ in associating antioxidant intake with disease risk needs further investigation.

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Section: Discussionmentioning

confidence: 99%

Validation of an FFQ to assess antioxidant intake in overweight postmenopausal women

Yang

Wáng

Davis

et al. 2013

Public Health Nutr.

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“…Correlation coefficients for carotenoid subclasses were generally higher than those from preceding FFQ (44,45) . Additionally, since the correlation analysis for testing validity has been questioned for its failure in measuring agreement (3,46) , cross-classification was used in the present study to bridge this gap (47) . Cross-classification for the current FFQ indicated reasonable agreement across tertiles of antioxidant intake between the 30 d FR and FFQ and an acceptable low misclassification percentage, which further suggested that our FFQ could provide a similar ranking of antioxidant intake as did the 30 d FR.…”

Section: Discussionmentioning

confidence: 99%

Validation of an FFQ to assess short-term antioxidant intake against 30 d food records and plasma biomarkers

Yang

Wáng

Davis

et al. 2012

Public Health Nutr.

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Objective: To validate a brief FFQ developed for capturing short-term antioxidant intake in a sample of US college students. Design: A seventy-four-item antioxidant FFQ was developed based on major antioxidant sources in the American diet. The FFQ was validated against 30 d food records (FR) and plasma antioxidant concentrations. The reliability of the FFQ was evaluated by two FFQ administered at a 1-month interval. Settings: University of Connecticut, CT, USA. Subjects: Sixty healthy college students. Results: Estimates of dietary antioxidants from the FFQ were moderately to highly correlated with those estimated from the 30 d FR (r 5 0?29-0?80; P , 0?05) except for g-tocopherol and b-cryptoxanthin. Total antioxidant capacity from diet only or from diet and supplements estimated by the 30 d FR and FFQ were highly correlated (r 5 0?67 and 0?71, respectively; P , 0?0001). The FFQ categorized 91 % of participants into the same or adjacent tertiles of antioxidant intake as the 30 d FR. Most dietary carotenoids estimated from the FFQ were correlated with plasma levels (P , 0?05). Correlation coefficients for test-retest reliability ranged from 0?39 to 0?86. More than 94 % of the participants were classified in the same or adjacent tertiles between the two administrations of the FFQ. Conclusions:The brief FFQ demonstrated reasonable validity for capturing a comprehensive antioxidant intake profile. This FFQ is applicable in epidemiological or clinical studies to capture short-term antioxidant intake or to simply document the variations of antioxidant intake in intervention trials. Cross-validation studies are warranted in other target populations.

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“…Online dietary assessment tools have used similar approaches to standard methods and include FFQ (17)(18)(19) , 24 h recalls (20)(21)(22) and dietary records (1,23) . Some tools are a hybrid method such as the Oxford WebQ, which is presented as a 24 h recall but relies on reporting of twenty-one food groups (24) over a 24 h period.…”

Section: Development Of Web-based Tools To Measure Dietmentioning

confidence: 99%

Measuring diet in the 21st century: use of new technologies

Cade

2016

Proc. Nutr. Soc.

135

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The advent of the internet and smartphone technology has allowed dietary assessment to reach the 21st century! The variety of foods available on the supermarket shelf is now greater than ever before. New approaches to measuring diet may help to reduce measurement error and advance our understanding of nutritional determinants of disease. This advance provides the potential to capture detailed dietary data on large numbers of individuals without the need for costly and time-consuming manual nutrition coding. This aim of the present paper is to review the need for new technologies to measure diet with an overview of tools available. The three main areas will be addressed: (1) development of web-based tools to measure diet; (2) use of smartphone apps to self-monitor diet; (3) improving the quality of dietary assessment through development of an online library of tools. A practical example of the development of a web-based tool to assess diet myfood24 (www.myfood24. org) will be given exploring its potential, limitations and challenges. The development of a new food composition database using back-of-pack information will be described. Smartphone apps used to measure diet with a focus on obesity will be reviewed. Many apps are unreliable in terms of tracking, and most are not evaluated. Accurate and consistent measurement of diet is needed for public health and epidemiology. The choice of the most appropriate dietary assessment method tends to rely on experience. The DIET@NET partnership has developed best practice guidelines for selection of dietary assessment tools, which aim to improve the quality, consistency and comparability of dietary data. These developments provide us with a step-change in our ability to reliably characterise food and nutrient intake in population studies. The need for high-quality, validated systems will be important to fully realise the benefits of new technologies.

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Validity and reproducibility of a web-based, self-administered food frequency questionnaire

Cited by 142 publications

References 29 publications

Validation of an FFQ to assess antioxidant intake in overweight postmenopausal women

Validation of an FFQ to assess antioxidant intake in overweight postmenopausal women

Validation of an FFQ to assess short-term antioxidant intake against 30 d food records and plasma biomarkers

Measuring diet in the 21st century: use of new technologies

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