263,501 items of data are available, covering 228,661 participants, encoded using Data-Coding 100603
Defined-instances run from 0 to 3, labelled using Instancing 2
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
228,654 participants, 228,654 items
Instance 1 : First repeat assessment visit (2012-13)
9,934 participants, 9,934 items
Instance 2 : Imaging visit (2014+)
23,385 participants, 23,385 items
Instance 3 : First repeat imaging visit (2019+)
1,528 participants, 1,528 items
ACE touchscreen question "Have you had any major operations? (For example, operations that required an overnight stay in hospital)"
If the participant activated the Help button they were shown the message:
|If you are unsure if you have had a 'major' operation|
select Do not know and you will be asked about this by
an interviewer later during this visit.
Field 2415 is male question equivalent of female question Field 2844
There are no tabulations involving field 2415.
Registered researchers may, when logged in, request that new analyses be generated and displayed here.