Data
536,833 items of data are available, covering 432,839 participants, encoded using Data-Coding
100338.
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
423,017 participants, 423,017 items
Instance 1 : First repeat assessment visit (2012-13)
17,560 participants, 17,560 items
Instance 2 : Imaging visit (2014+)
84,192 participants, 84,192 items
Instance 3 : First repeat imaging visit (2019+)
12,064 participants, 12,064 items
Notes
ACE touchscreen question "Is there any difference between your mobile phone use now compared to two years ago?"
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 1140 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