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2,596 items of data are available, covering 2,596 participants, encoded using Data-Coding 54. Defined-instances run from 0 to 0, labelled using Instancing 2.
Against participant wishes913
Lack of time29
Unwilling to remove contact lenses342
Reason not known543
Other health reason65
Unable to understand instructions10
Other eye-related reason528
Counts of participants/items last updated 09 Feb 2020.
Reason intraocular pressure measurement (left eye) was not performed (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.