: Data-Field 20062

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Data

3,358 items of data are available, covering 3,358 participants, encoded using Data-Coding 54.
Defined-instances run from 0 to 0, labelled using Instancing 2.

CategoryCount

Declined24840
- Against participant wishes517
- Lack of time1755
- Feeling unwell0
- Unwilling to remove contact lenses212
Equipment failure1500
- Malfunction90
- Not available60
Reason not known11
Unable7130
- Other health reason44
- Unable to understand instructions6
- Other eye-related reason585
- Visually impaired78

Notes

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.

1 Related Data-Field

Field ID	Description	Relationship
20061	Reason for skipping OCT (right)	Field 20061 is the opposite-side complement to Current Field

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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