Data
502,250 items of data are available, covering 429,912 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
423,228 participants, 423,228 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 "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