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Closer - The home of longitudinal research

Summary

There are no specific rules for harmonising dietary data across studies.

The approach taken depends on the research question and the data available.

A metadata inventory that document methods, data formats and nuances of data processing etc. is the most time-consuming aspect of harmonisation.

With this guide, we have completed this key step for the original CLOSER partner studies, so that researchers can focus on how best to answer their specific diet-related questions.

Explore the cross-study guides

Dietary data

Learn about the dietary measures and estimated nutrient intake information available within and across eight CLOSER partner studies.

Physical activity measures

Explore the measures used to assess diverse aspects of physical activity within and across six CLOSER partner studies.

Cognitive measures data

Explore the measures used to assess diverse aspects of cognition within and across five British birth cohort studies.