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.
548,738 items of data are available, covering 502,171 participants.
Defined-instances run from 0 to 2, labelled using Instancing 2
Units of measurement are metre-grid.
- There are 373 distinct values.
- Mean = 412307
- Std.dev = 65707.4
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
502,162 participants, 502,162 items
- There are 356 distinct values.
- Mean = 413827
- Std.dev = 67566.5
Instance 1 : First repeat assessment visit (2012-13)
20,325 participants, 20,325 items
- There are 130 distinct values.
- Mean = 389220
- Std.dev = 27958.4
- 2 items above graph maximum of 509000
Instance 2 : Imaging visit (2014+)
26,251 participants, 26,251 items
- There are 279 distinct values.
- Mean = 401112
- Std.dev = 41633.5
- 3 items below graph minimum of 229000
- 3 items above graph maximum of 556000
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 22689.
This field supersedes Field 20074. 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
|20074||Home location at assessment - east c ...||Current Field supersedes Field 20074|
|22689||Home location at assessment - north ...||Field 22689 should be used in conjunction with Current Field|