Data
501,938 items of data are available, covering 501,938 participants.
| Maximum | 2025-09-18 |
| Decile 9 | 2023-10-04 |
| Decile 8 | 2023-07-21 |
| Decile 7 | 2023-07-04 |
| Decile 6 | 2023-03-16 |
| Median | 2021-05-18 |
| Decile 4 | 2015-04-22 |
| Decile 3 | 2010-01-26 |
| Decile 2 | 2009-02-21 |
| Decile 1 | 2008-05-20 |
| Minimum | 2006-03-13 |
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- There are 5353 distinct values.
- Mean = 2017-06-11
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Notes
This indicates the date on which a participant last personally contributed data to UK Biobank (i.e. the most recent occasion/event), either by attendance at an assessment centre, completing an online questionnaire. or by returning a device. The large spike on the graph is due to the number of participants who completed the last online questionnaire.
For a list of the events summarised by this field, see the Related Data-Fields tab under Field 20145.
