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

Janet E. Cade, Marisol Warthon-Medina, Salwa A. 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, DIET@NET consortium

    Research output: Contribution to journalArticlepeer-review

    66 Citations (Scopus)


    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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