Data
283,268 items of data are available, covering 228,536 participants, encoded using Data-Coding
100603.
Defined-instances run from 0 to 3, labelled using Instancing
2.
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
228,521 participants, 228,521 items
Instance 1 : First repeat assessment visit (2012-13)
9,929 participants, 9,929 items
Instance 2 : Imaging visit (2014+)
40,550 participants, 40,550 items
Instance 3 : First repeat imaging visit (2019+)
4,268 participants, 4,268 items
Notes
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.
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Field 2415 is male question equivalent of female question Field 2844