: Data-Field 20052

Data-Field 20052

Description:	Reason for skipping refractometry (left)
Category:	Assessment centre ⏵ Eye measures ⏵ Refractometry ⏵ Refractometer 1
	Physical measures

Participants

1,520

Categorical (single)

Both sexes

Aug 2012

1,520

Data

Defined (1)

Aug 2012

Complete

Derived

d1 o1 s1

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Data

1,520 items of data are available, covering 1,520 participants, encoded using Data-Coding 54.
Defined-instances run from 0 to 0, labelled using Instancing 2.

CategoryCount

Declined6470
- Against participant wishes276
- Lack of time25
- Feeling unwell0
- Unwilling to remove contact lenses346
Equipment failure1630
- Malfunction30
- Not available133
Reason not known17
Unable6930
- Other health reason48
- Unable to understand instructions0
- Other eye-related reason517
- Visually impaired128

Notes

Reason refractometry 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
20055	Reason for skipping refractometry (r ...	Current Field is the opposite-side complement to Field 20055

3 Resources

Preview	Name	Res ID
$Preview of Auto-refraction measurement$	Auto-refraction measurement	100110
$Preview of Auto-refraction measurement close-up$	Auto-refraction measurement close-up	100111
$Link to Auto-refraction measurement using ACE$	Auto-refraction measurement using ACE	100242

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