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782 items of data are available, covering 782 participants, encoded using Data-Coding 71. Defined-instances run from 0 to 0, labelled using Instancing 2.
Against participant wishes426
Lack of time31
Reason not known31
Other health reason4
Sample already provided2
Reason saliva sample was not collected (entered as free-text by a UK Biobank Staff member).
This field was created by post-hoc coding the free-text reasons entered during the assessment centre visit. The encoding used was constructed after the data had been examined to determine suitable representative groupings.