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 705 distinct values.
- Mean = 353083
- Std.dev = 149979
- 2 items above graph maximum of 960000
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
502,132 participants, 502,132 items
- There are 550 distinct values.
- Mean = 347701
- Std.dev = 153941
Instance 1 : First repeat assessment visit (2012-13)
20,324 participants, 20,324 items
- There are 127 distinct values.
- Mean = 397145
- Std.dev = 21237.1
- 2 items below graph minimum of 321000
- 7 items above graph maximum of 477000
Instance 2 : Imaging visit (2014+)
35,736 participants, 35,736 items
- There are 691 distinct values.
- Mean = 399948
- Std.dev = 118629
- 8 items above graph maximum of 886000
Instance 3 : First repeat imaging visit (2019+)
1,054 participants, 1,054 items
- There are 292 distinct values.
- Mean = 478376
- Std.dev = 134247
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 22688.
This field supersedes Field 20075. 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. The data for all assessments has been corrected to use truncation (rounding down) instead of rounding, to derive the 1km resolution data.
Further updates are planned, in particular for the later instances, but minor amendments should also be expected to the baseline (instance 0) data as we hope to obtain additional geocodings in future.
These grid co-ordinates (to a 1km accuracy) will only be released following special approval.
For most purposes, these grid co-ordinates rounded to a 1km accuracy will provide sufficient information on location of residence at assessment. If a higher level of granularity is required, values are also available at a 100m resolution, which can be found in Field 22686 and Field 22687.
2 Related Data-Fields
|22688||Home location at assessment - east c ...||Current Field should be used in conjunction with Field 22688|
|22687||Home location at assessment - north ...||Current Field is a rounded version of Field 22687|