575,018 items of data are available, covering 501,586 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
501,569 participants, 501,569 items
Instance 1 : First repeat assessment visit (2012-13)
20,335 participants, 20,335 items
Instance 2 : Imaging visit (2014+)
48,639 participants, 48,639 items
Instance 3 : First repeat imaging visit (2019+)
4,475 participants, 4,475 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.