597,677 items of data are available, covering 501,500 participants, encoded using Data-Coding 100346
Defined-instances run from 0 to 3, labelled using Instancing 2
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
501,472 participants, 501,472 items
Instance 1 : First repeat assessment visit (2012-13)
20,334 participants, 20,334 items
Instance 2 : Imaging visit (2014+)
69,873 participants, 69,873 items
Instance 3 : First repeat imaging visit (2019+)
5,998 participants, 5,998 items
ACE touchscreen question "How likely are you to doze off or fall asleep during the daytime when you don't mean to? (e.g. when working, reading or driving)"
If the participant activated the Help button they were shown the message:
|If you are unsure, please provide an estimate or select Do not know. |
The option "All of the time" was removed during the Initial Assessment phase.