Returned Datasets are records of original work done by researchers using project data which have been made available for use by other researchers. Each returned item is accompanied by publicly available documentation describing the contents, however the actual contents themselves are only accessible to Registered Researchers on approved Applications.

Researchers should be aware that UK Biobank does not perform any quality assurance checks on the code or datasets made available via the returns catalogue. Where possible we try to ensure that datasets which include externally derived variables are accompanied by the code used to generate them, and would encourage users to perform their own review to confirm that the data meet their own quality requirements.