Evaluation of change in dietary methodology in NDNS rolling programme: Stage 1
The first stage in the evaluation of the dietary method change in the National Diet and Nutrition Survey (NDNS) rolling programme.
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This report describes the change in dietary methodology in the National Diet and Nutrition Survey rolling programme (NDNS RP) from a paper diary to an online recall, implemented from fieldwork Year 12 (2019 to 2020). It sets out the plan for evaluating the impact of the changes on participation in the survey and the resulting data, and presents findings from the first stage of this evaluation.