Data
191,374 items of data are available, covering 125,074 participants, encoded using Data-Coding
100361.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Array indices run from 0 to 3.
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
119,899 participants, 151,308 items
Instance 1 : First repeat assessment visit (2012-13)
5,063 participants, 6,483 items
Instance 2 : Imaging visit (2014+)
22,926 participants, 27,962 items
Instance 3 : First repeat imaging visit (2019+)
4,570 participants, 5,621 items
Notes
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