UK Biobank is conducting a range of additional phenotyping assessments in all (or large subsets) of the participants. Data are already available both from a detailed dietary web questionnaire [11], completed up to four times by over 200,000 participants, and from the first repeat of the entire baseline assessment in around 20,000 participants [12]. Over the coming months and years, further data will become available from: a range of biochemical assays and genome-wide genotyping of baseline samples from all participants; Web-based questionnaires to assess specific characteristics in more detail (e.g., cognitive function, occupational history); and, in subsets of 100,000 participants, collection of data from physical activity monitors and multi-modal imaging (Table 3).
