481,104 items of data are available, covering 428,348 participants, encoded using Data-Coding 100338
Defined-instances run from 0 to 3, labelled using Instancing 2
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
423,347 participants, 423,347 items
Instance 1 : First repeat assessment visit (2012-13)
17,569 participants, 17,569 items
Instance 2 : Imaging visit (2014+)
39,409 participants, 39,409 items
Instance 3 : First repeat imaging visit (2018+)
779 participants, 779 items
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.|
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
2 Related Data-Fields
|10886||Difference in mobile phone use compa ...||Field 10886 is the pilot-study predecessor of main-study Current Field|
|1110||Length of mobile phone use||Current Field 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 ~F11|
There are no tabulations involving field 1140.
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