311,224 items of data are available, covering 272,865 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
272,853 participants, 272,853 items
Instance 1 : First repeat assessment visit (2012-13)
10,401 participants, 10,401 items
Instance 2 : Imaging visit (2014+)
25,281 participants, 25,281 items
Instance 3 : First repeat imaging visit (2019+)
2,689 participants, 2,689 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.