Data
502,248 items of data are available, covering 429,910 participants, encoded using Data-Coding
100339.
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
423,226 participants, 423,226 items
Instance 1 : First repeat assessment visit (2012-13)
17,566 participants, 17,566 items
Instance 2 : Imaging visit (2014+)
56,470 participants, 56,470 items
Instance 3 : First repeat imaging visit (2019+)
4,986 participants, 4,986 items
Notes
ACE touchscreen question "On what side of the head do you usually use a mobile phone?"
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.
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Field 1150 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to Field 1110