173,415 items of data are available, covering 122,729 participants, encoded using Data-Coding 100361
Defined-instances run from 0 to 3, labelled using Instancing 2
Array indices run from 0 to 3.
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
120,027 participants, 151,462 items
Instance 1 : First repeat assessment visit (2012-13)
5,067 participants, 6,489 items
Instance 2 : Imaging visit (2014+)
11,376 participants, 14,061 items
Instance 3 : First repeat imaging visit (2019+)
1,157 participants, 1,403 items
ACE touchscreen question "Why did you stop smoking? (You can select more than one answer)"
The following checks were performed:
- If code -7 was selected, then no additional choices were allowed.
- If code -1 was selected, then no additional choices were allowed.
- If code -3 was selected, then no additional choices were allowed.
Field 6157 was collected from participants who indicated that in the past they smoked tobacco on most or all days, as defined by their answers to Field 1249 and that during the time they smoked they stopped for more than 6 months, as defined by their answers to Field 1249