UKB : Data-Field 20056

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Data

410 items of data are available, covering 410 participants, encoded using Data-Coding 56.
Defined-instances run from 0 to 0, labelled using Instancing 2.

CategoryCount

Declined1000
- Against participant wishes66
- Lack of time25
- Unwilling to remove contact lenses9
Equipment failure80
- Malfunction7
- Not available1
Reason not known1
Unable3010
- Other health reason8
- Unable to understand instructions27
- Other eye-related reason36
- Visually impaired153
- Forgot glasses77

Counts of participants/items last updated 30 Oct 2020.

Notes

Reason visual acuity 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.

5 Categories

Category ID	Description	Items
100013	Eye measures	+153
706	Physical measures	575
100006	Physical measures	+419
100000	UK Biobank Assessment Centre	+2145
100017	Visual acuity	32

1 Related Data-Fields

Field ID	Description	Relationship
20057	Reason for skipping visual acuity (left)	Current Field is the opposite-side complement to Field 20057

0 Tabulations

There are no tabulations involving field 20056.

Registered researchers may, when logged in, request that new analyses be generated and displayed here.

4 Resources

Preview	Name	Res ID
	Visual acuity scoring	100147
	Visual acuity setup	100148
	Visual acuity test	100149
	Visual-acuity testing using ACE	100250

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