DIET@NET: Best Practice Guidelines for dietary assessment in health research

Janet E. Cade*, Marisol Warthon-Medina, Salwa Albar, Nisreen A. Alwan, Andrew Ness, Mark Roe, Petra A. Wark, Katharine Greathead, Victoria J. Burley, Paul Finglas, Laura Johnson, Polly Page, Katharine Roberts, Toni Steer, Jozef Hooson, Darren C. Greenwood, Sian Robinson, Margaret Allman-Farinelli, Gina Ambrosini, Lene Frost AndersenAnnie Anderson, Elisa Bandera, Thomas Baranowski, Maria Bryant, Tracy Burrows, Susan Church, Clare Collins, Leone Craig, Anne de Looy, Adam Drewnowski, Kim Edwards, Pauline Emmett, Emma Foster, Rosalind Gibson, Darren Greenwood, Mirjana Gurinovic, Michelle Holdsworth, Bridget Holmes, Emmanuelle Kesse-Guyot, Sharron Kirkpatrick, Fariba Kolahdooz, Carl Lachat, Julie Lanigan, Mark Lawrence, Alison Lennox, Renata Levy, Maria Laura Louzada, Janice L. Thompson, Laura Johnson, Andrew Ness, on behalf of the DIET@NET consortium

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

66 Citations (Scopus)
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Background: Dietary assessment is complex, and strategies to select the most appropriate dietary assessment tool (DAT) in epidemiological research are needed. The DIETary Assessment Tool NETwork (DIET@NET) aimed to establish expert consensus on Best Practice Guidelines (BPGs) for dietary assessment using self-report. Methods: The BPGs were developed using the Delphi technique. Two Delphi rounds were conducted. A total of 131 experts were invited, and of these 65 accepted, with 48 completing Delphi round I and 51 completing Delphi round II. In all, a total of 57 experts from North America, Europe, Asia and Australia commented on the 47 suggested guidelines. Results: Forty-three guidelines were generated, grouped into the following four stages: Stage I. Define what is to be measured in terms of dietary intake (what? who? and when?); Stage II. Investigate different types of DATs; Stage III. Evaluate existing tools to select the most appropriate DAT by evaluating published validation studies; Stage IV. Think through the implementation of the chosen DAT and consider sources of potential biases. Conclusions: The Delphi technique consolidated expert views on best practice in assessing dietary intake. The BPGs provide a valuable guide for health researchers to choose the most appropriate dietary assessment method for their studies. These guidelines will be accessible through the Nutritools website,

Original languageEnglish
Article number202
Number of pages15
JournalBMC Medicine
Issue number1
Publication statusPublished - 15 Nov 2017


  • Dietary assessment methods
  • Guidelines
  • Nutritional epidemiology
  • Nutrition
  • Public health


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  • NIHR BRC Nutrition

    Ness, A. R.


    Project: Research, Parent

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