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 3235 distinct values.
- Mean = 412862
- Std.dev = 65803.5
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
502,132 participants, 502,132 items
- There are 2901 distinct values.
- Mean = 414276
- Std.dev = 67563.8
Instance 1 : First repeat assessment visit (2012-13)
20,324 participants, 20,324 items
- There are 1173 distinct values.
- Mean = 389661
- Std.dev = 27960.9
- 2 items above graph maximum of 509600
Instance 2 : Imaging visit (2014+)
35,736 participants, 35,736 items
- There are 2854 distinct values.
- Mean = 406158
- Std.dev = 52072.4
- 51 items below graph minimum of 214500
- 128 items above graph maximum of 577050
Instance 3 : First repeat imaging visit (2019+)
1,054 participants, 1,054 items
- There are 613 distinct values.
- Mean = 413623
- Std.dev = 54109.3
- 3 items below graph minimum of 208000
- 2 items above graph maximum of 584200
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 East co-ordinate needs to be used in conjunction with the North co-ordinate in Field 22687.
This field supersedes Field 20033. 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
|22688||Home location at assessment - east c ...||Field 22688 is a rounded version of Current Field|
|22687||Home location at assessment - north ...||Field 22687 should be used in conjunction with Current Field|