Data
572,824 items of data are available, covering 464,393 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
462,063 participants, 462,063 items
Instance 1 : First repeat assessment visit (2012-13)
19,681 participants, 19,681 items
Instance 2 : Imaging visit (2014+)
82,383 participants, 82,383 items
Instance 3 : First repeat imaging visit (2019+)
8,697 participants, 8,697 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