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1,583 items of data are available, covering 1,583 participants, encoded using Data-Coding 50. Defined-instances run from 0 to 0, labelled using Instancing 2.
Against participant wishes572
Lack of time9
Other health reason79
Reason not stated34
Poor venous access/flow780
Recently donated blood3
Reason not known2
Counts of participants/items last updated 25 Jul 2021.
Reason blood sampling was not attempting (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.