Data
517,673 items of data are available, covering 431,342 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
423,199 participants, 423,199 items
Instance 1 : First repeat assessment visit (2012-13)
17,565 participants, 17,565 items
Instance 2 : Imaging visit (2014+)
70,311 participants, 70,311 items
Instance 3 : First repeat imaging visit (2019+)
6,598 participants, 6,598 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