WARNING: the interactive features of this website use CSS3, which your browser does not support. To use the full features of this website, please update your browser.
3,359 items of data are available, covering 3,359 participants, encoded using Data-Coding 54. Defined-instances run from 0 to 0, labelled using Instancing 2.
Against participant wishes517
Lack of time1756
Unwilling to remove contact lenses212
Reason not known11
Other health reason44
Unable to understand instructions6
Other eye-related reason585
Counts of participants/items last updated 25 Jul 2021.
Reason optical coherence tomography 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.