317,416 items of data are available, covering 272,846 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
272,833 participants, 272,833 items
Instance 1 : First repeat assessment visit (2012-13)
10,401 participants, 10,401 items
Instance 2 : Imaging visit (2014+)
31,464 participants, 31,464 items
Instance 3 : First repeat imaging visit (2019+)
2,718 participants, 2,718 items
ACE touchscreen question "Have you had any other 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.
refers to operations other than hysterectomy and bilateral oophorectomy.