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774,960 items of data are available, covering 502,514 participants. Array indices run from 0 to 14.
There are 12370 distinct values.
Mean = 2000-08-25
9352 items below graph minimum of 1963-11-30
Counts of participants/items last updated 07 Sep 2019.
This the date at which a participant is first recorded (according to the record sources available to UK Biobank) at the location given in Field 22702 and Field 22704 (or the more precise, but restricted, Field 22701 and Field 22703).
Note that, when data is supplied to approved researchers, the array index of dates will not necessarily be in the same order as the dates themselves as UK Biobank does not itself receive location data in chronological order.