Data
593,880 items of data are available, covering 498,790 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
497,675 participants, 497,675 items
Instance 1 : First repeat assessment visit (2012-13)
20,334 participants, 20,334 items
Instance 2 : Imaging visit (2014+)
69,873 participants, 69,873 items
Instance 3 : First repeat imaging visit (2019+)
5,998 participants, 5,998 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.