Data
541,627 items of data are available, covering 463,852 participants, encoded using Data-Coding
100348.
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
462,287 participants, 462,287 items
Instance 1 : First repeat assessment visit (2012-13)
19,686 participants, 19,686 items
Instance 2 : Imaging visit (2014+)
54,445 participants, 54,445 items
Instance 3 : First repeat imaging visit (2019+)
5,209 participants, 5,209 items
Notes
ACE touchscreen question "In the past, how often have you smoked tobacco?"
Field 1249 was collected from all participants except those who indicated they currently smoke on most or all days, as defined by their answers to Field 1239