Data
562,588 items of data are available, covering 464,349 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
462,237 participants, 462,237 items
Instance 1 : First repeat assessment visit (2012-13)
19,685 participants, 19,685 items
Instance 2 : Imaging visit (2014+)
73,807 participants, 73,807 items
Instance 3 : First repeat imaging visit (2019+)
6,859 participants, 6,859 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