1,107,327 items of data are available, covering 498,860 participants, encoded using Data-Coding 100305
Defined-instances run from 0 to 3, labelled using Instancing 2
Array indices run from 0 to 5.
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
497,715 participants, 901,163 items
Instance 1 : First repeat assessment visit (2012-13)
20,333 participants, 42,829 items
Instance 2 : Imaging visit (2014+)
75,333 participants, 148,976 items
Instance 3 : First repeat imaging visit (2019+)
6,946 participants, 14,359 items
ACE touchscreen question "Which of the following qualifications do you have? (You can select more than one)"
The following checks were performed:
- If code -7 was selected, then no additional choices were allowed.
- If code -3 was selected, then no additional choices were allowed.
If the participant activated the Help button they were shown the message:
|A levels/AS levels and equivalent includes the Higher School Certificate|
O levels/GCSEs and equivalent includes the School Certificate.