: Data-Field 22700

Data-Field 22700

Description:	Date first recorded at location [obsolete]
Category:	Additional exposures ⏵ Local environment ⏵ Home locations
	Geographical measures + Geographical and location

Participants

501,925

Date

Both sexes

Jan 2017

773,974

Data

Singular

Aug 2025

Ongoing

Primary

Yes (15)

o1 s1

Field is currently retired.

Data

1313

Maximum	2017-01-09
Decile 9	2012-06-11
Decile 8	2009-07-02
Decile 7	2007-05-29
Decile 6	2005-01-11
Median	2002-04-01
Decile 4	1999-06-05
Decile 3	1997-02-06
Decile 2	1993-10-11
Decile 1	1988-05-05
Minimum	1939-01-05

There are 11898 distinct values.
Mean = 2000-10-18
7392 items below graph minimum of 1964-03-29
2385 items have value 1904-04-04 (Date in or before calendar year of birth)

Notes

Please note that this field is obsolete and researchers should use the updated home location history data instead. Please see the description on Category 150 for more information.

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 highly 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.

Please be aware that there are some inherent inaccuracies in the date of a change of address as it will often correspond to the date the address was changed in the corresponding IT system, rather than the actual address change, due to delays in participants informing UK Biobank or external agencies that they have moved. In addition, we have identified a number of dates that have been incorrectly processed in the construction of Field 22700 and which are up to 30 months different from the participant's change of address notification.

Coding 1313 defines 1 special value:

1904-04-04 represents "Date in or before calendar year of birth"