This information is regarded as restricted and will be supplied to researchers only when absolutely necessary.
See the Related Data-Fields tab below for any unrestricted alternatives.
559,246 items of data are available, covering 502,146 participants.
Defined-instances run from 0 to 3, labelled using Instancing 2
Units of measurement are metre-grid.
- There are 4886 distinct values.
- Mean = 353533
- Std.dev = 149978
- 2 items above graph maximum of 960800
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
502,132 participants, 502,132 items
- There are 4055 distinct values.
- Mean = 348151
- Std.dev = 153939
Instance 1 : First repeat assessment visit (2012-13)
20,324 participants, 20,324 items
- There are 1079 distinct values.
- Mean = 397600
- Std.dev = 21233.2
- 2 items below graph minimum of 322700
- 7 items above graph maximum of 476300
Instance 2 : Imaging visit (2014+)
35,736 participants, 35,736 items
- There are 4254 distinct values.
- Mean = 400402
- Std.dev = 118627
- 8 items above graph maximum of 886350
Instance 3 : First repeat imaging visit (2019+)
1,054 participants, 1,054 items
- There are 704 distinct values.
- Mean = 478821
- Std.dev = 134246
- 1 item above graph maximum of 803200
This location information is based on the address where the participant lived at the time of their assessment.
The location co-ordinates use the Ordnance Survey (OSGB) reference. This North co-ordinate needs to be used in conjunction with the East co-ordinate in Field 22686.
This field supersedes Field 20034. The data for the baseline assessment (instance 0) has been updated to use more accurate geocoding data where available, based on the full address instead of the postcode alone.
Further updates are planned, in particular for the later instances.
These grid co-ordinates (to a 100m accuracy) will only be released following special approval. If access is approved, researchers will be required to hold these data-fields separately from their main project (a new set of encoded ids will be supplied) while they derive their required measures, which will then be made available to their main project only after these fields have been deleted.
For most purposes, grid co-ordinates rounded to a 1km accuracy will provide sufficient information on location of residence at assessment. These rounded values are found in Field 22688 and Field 22689.
2 Related Data-Fields
|22686||Home location at assessment - east c ...||Current Field should be used in conjunction with Field 22686|
|22689||Home location at assessment - north ...||Field 22689 is a rounded version of Current Field|