Extended Data Table 1.

Types and dates of data collection in UK Biobank

^aThe baseline visit (including the touchscreen questionnaire, physical measures and biological sampling) was repeated approximately 5 years later (2012–2013) in a subset of 20,000 participants and in those who attended an imaging assessment centre (2014–2022).

^bIncludes 70,000 participants who completed the diet online questionnaire at the end of the recruitment visit⁴⁸.

^cA repeat assessment of physical activity on four occasions over a 12-month period is being collected on 2,5000 of these participants (2018–2019).

^dBiochemistry markers were measured in the baseline sample for 500,000 participants and in the repeat assessment sample for 20,000 participants. The urinary biomarkers were made available in 2016; the serum and red blood cell markers available are pending (at the time of press).

^eThe imaging study includes brain, heart and body MRI, carotid ultrasound and 12-lead ECG scan and a full-body dual energy X-ray absorptiometry scan, plus a repeat of the baseline assessment (including biological sampling). Repeat imaging in a subset of participants is expected to start in 2019.

^fData are currently available for 25,000 participants, with the remaining 75,000 participants to attend over the next few years. See Supplementary Table 1 for further information about these data types.