639,521 items of data are available, covering 501,460 participants, encoded using Data-Coding 100610
Defined-instances run from 0 to 3, labelled using Instancing 2
Array indices run from 0 to 4.
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
501,433 participants, 536,824 items
Instance 1 : First repeat assessment visit (2012-13)
20,334 participants, 21,697 items
Instance 2 : Imaging visit (2014+)
69,873 participants, 74,622 items
Instance 3 : First repeat imaging visit (2019+)
5,998 participants, 6,378 items
ACE touchscreen question "Has a doctor ever told you that you have had any of the following conditions? (You can select more than one answer)"
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:
|If you do not know if you have had any of the listed|
conditions, enter None of the above. You can check this
with an interviewer later in the visit.