Data
614,433 items of data are available, covering 501,312 participants, encoded using Data-Coding
100335.
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
501,281 participants, 501,281 items
Instance 1 : First repeat assessment visit (2012-13)
20,328 participants, 20,328 items
Instance 2 : Imaging visit (2014+)
84,020 participants, 84,020 items
Instance 3 : First repeat imaging visit (2019+)
8,804 participants, 8,804 items
Notes
ACE touchscreen question "For approximately how many years have you been using a mobile phone at least once per week to make or receive calls?"
If the participant activated the Help button they were shown the message:
Do not include time spent text messaging. If you are unsure, please provide an estimate or select Do not know.
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