640,923 items of data are available, covering 498,640 participants, encoded using Data-Coding 100538
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
497,731 participants, 558,997 items
Instance 1 : First repeat assessment visit (2012-13)
20,334 participants, 22,637 items
Instance 2 : Imaging visit (2014+)
49,033 participants, 53,570 items
Instance 3 : First repeat imaging visit (2019+)
5,214 participants, 5,719 items
ACE touchscreen question "Do you have any of the following? (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:
|Answer this question thinking about the past year.|