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547,843 items of data are available, covering 501,472 participants, encoded using Data-Coding 1001
Defined-instances run from 0 to 3, labelled using Instancing 2
This is an amalgam of sequential branching questions asked during the initial Assessment Centre visit as part of the touchscreen questionnaire.
The question was dropped from the touchscreen protocol on 24/10/2016. It was reintroduced in early 2023, as it was required as a parameter for some repeat imaging measures.
1 Related Data-Field
|22006||Genetic ethnic grouping||Field 22006 is a genetic analogue of self-identified Current Field|
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