Data
620,266 items of data are available, covering 498,686 participants, encoded using Data-Coding
100631.
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
497,463 participants, 497,463 items
Instance 1 : First repeat assessment visit (2012-13)
20,328 participants, 20,328 items
Instance 2 : Imaging visit (2014+)
89,817 participants, 89,817 items
Instance 3 : First repeat imaging visit (2019+)
12,658 participants, 12,658 items
Notes
ACE touchscreen question "Do you have any difficulty with your hearing?"
The option to identify oneself as completely deaf was added in 2009 alongside the introduction of the speech-in-noise test.