: Data-Field 20012

Data-Field 20012

Description:	Method of recording time when cancer first diagnosed
Category:	Assessment centre ⏵ Verbal interview ⏵ Medical conditions
	Health outcomes + Self-reported medical conditions

Participants

52,398

Categorical (single)

Both sexes

Feb 2012

64,799

Data

Defined (4)

Aug 2025

Complete

Primary

Yes (6)

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Data

64,799 items of data are available, covering 52,398 participants, encoded using Data-Coding 14.
Defined-instances run from 0 to 3, labelled using Instancing 2.
Array indices run from 0 to 5.

Graph illustrating main data

4 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
41,658 participants, 44,753 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
2,277 participants, 2,430 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
13,766 participants, 15,126 items
Graph illustrating main data

Instance 3 : First repeat imaging visit (2019+)
2,289 participants, 2,490 items
Graph illustrating main data

Notes

Participants were able to record the time the cancer was diagnosed by entering either their age or the year. Some participants recorded an event but were unable to recall the time.

1 Related Data-Field

Field ID	Description	Relationship
20001	Cancer code, self-reported	Current Field indicates if date or age was recorded for Field 20001

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