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@article{Wark:2018:10.1186/s12916-018-1113-8,
author = {Wark, PA and Hardie, LJ and Frost, GS and Alwan, NA and Carter, M and Elliott, P and Ford, HE and Hancock, N and Morris, MA and Mulla, UZ and Noorwali, EA and Petropoulou, K and Murphy, D and Potter, GDM and Riboli, E and Greenwood, DC and Cade, JE},
doi = {10.1186/s12916-018-1113-8},
journal = {BMC Medicine},
title = {Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews},
url = {http://dx.doi.org/10.1186/s12916-018-1113-8},
volume = {16},
year = {2018}
}

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TY  - JOUR
AB  - BackgroundOnline dietary assessment tools can reduce administrative costs and facilitate repeated dietary assessment during follow-up in large-scale studies. However, information on bias due to measurement error of such tools is limited. We developed an online 24-h recall (myfood24) and compared its performance with a traditional interviewer-administered multiple-pass 24-h recall, assessing both against biomarkers.MethodsMetabolically stable adults were recruited and completed the new online dietary recall, an interviewer-based multiple pass recall and a suite of reference measures. Longer-term dietary intake was estimated from up to 3 × 24-h recalls taken 2 weeks apart. Estimated intakes of protein, potassium and sodium were compared with urinary biomarker concentrations. Estimated total sugar intake was compared with a predictive biomarker and estimated energy intake compared with energy expenditure measured by accelerometry and calorimetry. Nutrient intakes were also compared to those derived from an interviewer-administered multiple-pass 24-h recall.ResultsBiomarker samples were received from 212 participants on at least one occasion. Both self-reported dietary assessment tools led to attenuation compared to biomarkers. The online tools resulted in attenuation factors of around 0.2–0.3 and partial correlation coefficients, reflecting ranking intakes, of approximately 0.3–0.4. This was broadly similar to the more administratively burdensome interviewer-based tool. Other nutrient estimates derived from myfood24 were around 10–20% lower than those from the interviewer-based tool, with wide limits of agreement. Intraclass correlation coefficients were approximately 0.4–0.5, indicating consistent moderate agreement.ConclusionsOur findings show that, whilst results from both measures of self-reported diet are attenuated compared to biomarker measures, the myfood24 online 24-h recall is comparable to the more time-consuming a
AU  - Wark,PA
AU  - Hardie,LJ
AU  - Frost,GS
AU  - Alwan,NA
AU  - Carter,M
AU  - Elliott,P
AU  - Ford,HE
AU  - Hancock,N
AU  - Morris,MA
AU  - Mulla,UZ
AU  - Noorwali,EA
AU  - Petropoulou,K
AU  - Murphy,D
AU  - Potter,GDM
AU  - Riboli,E
AU  - Greenwood,DC
AU  - Cade,JE
DO  - 10.1186/s12916-018-1113-8
PY  - 2018///
SN  - 1741-7015
TI  - Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews
T2  - BMC Medicine
UR  - http://dx.doi.org/10.1186/s12916-018-1113-8
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000440966000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/62097
VL  - 16
ER  -

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