: Data-Field 20061

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Data

3,162 items of data are available, covering 3,162 participants, encoded using Data-Coding 54.
Defined-instances run from 0 to 0, labelled using Instancing 2.

CategoryCount

Declined23780
- Against participant wishes456
- Lack of time1708
- Feeling unwell0
- Unwilling to remove contact lenses214
Equipment failure1810
- Malfunction181
- Not available0
Reason not known187
Unable4160
- Other health reason39
- Unable to understand instructions7
- Other eye-related reason267
- Visually impaired103

Notes

Reason optical coherence tomography measurement (right 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.

1 Related Data-Field

Field ID	Description	Relationship
20062	Reason for skipping OCT (left)	Current Field is the opposite-side complement to Field 20062

5 Resources

Preview	Name	Res ID
	OCT measurement	100113
	OCT measurement station	100132
	OCT scan in progress	100114
	OCT scan view	100115
	Optical-coherence tomography procedures using ACE	100237

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