Data
410,136 items of data are available, covering 342,512 participants, encoded using Data-Coding
100352.
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
307,541 participants, 307,541 items
Instance 1 : First repeat assessment visit (2012-13)
20,324 participants, 20,324 items
Instance 2 : Imaging visit (2014+)
75,325 participants, 75,325 items
Instance 3 : First repeat imaging visit (2019+)
6,946 participants, 6,946 items
Notes
ACE touchscreen question "Do you use a hearing aid most of the time?"
Initially this information was collected from all participants answering Yes to either Field 2247 (Field 10793 in the pilot) or Field 2257. When the speech-in-noise hearing test was introduced (2009), program logic was altered so that the information was collected from all participants except those who indicated they were completely deaf, as defined by their answers to Field 2247.