Data
604,076 items of data are available, covering 501,493 participants, encoded using Data-Coding
100343.
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
501,464 participants, 501,464 items
Instance 1 : First repeat assessment visit (2012-13)
20,333 participants, 20,333 items
Instance 2 : Imaging visit (2014+)
75,333 participants, 75,333 items
Instance 3 : First repeat imaging visit (2019+)
6,946 participants, 6,946 items
Notes
ACE touchscreen question "Do you have trouble falling asleep at night or do you wake up in the middle of the night?"
If the participant activated the Help button they were shown the message:
If this varies a lot, answer this question in relation to the last 4 weeks.
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