Data
275,279 items of data are available, covering 228,611 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
228,599 participants, 228,599 items
Instance 1 : First repeat assessment visit (2012-13)
9,933 participants, 9,933 items
Instance 2 : Imaging visit (2014+)
33,829 participants, 33,829 items
Instance 3 : First repeat imaging visit (2019+)
2,918 participants, 2,918 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