: Data-Field 30004

Data-Field 30004

Description:	White blood cell (leukocyte) count acquisition route
Category:	Biological samples ⏵ Blood assays ⏵ Blood count ⏵ Blood count processing
	Biomarkers

Participants

478,810

Categorical (single)

Both sexes

Jan 2012

502,877

Data

Defined (3)

Aug 2025

Complete

Auxiliary

o1 s2

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Data

502,877 items of data are available, covering 478,810 participants, encoded using Data-Coding 2226.
Defined-instances run from 0 to 2, labelled using Instancing 2.

Graph illustrating main data

3 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
477,633 participants, 477,633 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
19,389 participants, 19,389 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
5,855 participants, 5,855 items
Graph illustrating main data

Notes

Route whereby data for White blood cell (leukocyte) count was transferred from analyser device to UK Biobank core LIMS database.

2 Related Data-Fields

Field ID	Description	Relationship
30000	White blood cell (leukocyte) count	Current Field is the data route used to acquire the result in Field 30000
30002	White blood cell (leukocyte) count a ...	Current Field indicates how to interpret the time in Field 30002

3 Resources

Preview	Name	Res ID
	Coulter LH750 operator guide	7249
	Coulter LH750 reference	7248
	Haematology data processing summary	1453

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