: Data-Field 20160

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Data

572,066 items of data are available, covering 499,661 participants, encoded using Data-Coding 7.
Defined-instances run from 0 to 3, labelled using Instancing 2.

Graph illustrating main data

Counts of participants/items last updated 23 Oct 2021.

4 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
499,535 participants, 499,535 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
20,283 participants, 20,283 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
48,477 participants, 48,477 items
Graph illustrating main data

Instance 3 : First repeat imaging visit (2019+)
3,771 participants, 3,771 items
Graph illustrating main data

Notes

Derived using variables "Current tobacco smoking" (Field 1239) and "Past tobacco smoking" (Field 1249).

Individual classed as Eversmoker if Current tobacco smoking= most days (1) or occasionally (2) OR Past tobacco smoking= most days (1) or occasionally (2) or tried once or twice (3).

Individual were classed as Neversmoker if Current tobacco smoking= no (0) AND Past tobacco smoking= never (4).

Individuals who answered to either question "Do not know" (-1) "Prefer not to answer" (-3) and "None of the above" (-7) were not coded.

This derived data field has come from Professor Martin Tobin at the University of Leicester.

5 Categories

Category ID	Description	Items
100000	Assessment Centre	+2145
704	Lifestyle	461
100050	Lifestyle and environment	+158
100058	Smoking	33+1
100025	Touchscreen	+403

0 Related Data-Fields

There are no related data-fields

1 Resource

Preview	Name	Res ID
	Touchscreen questionnaire ordering, validation and dependencies	113241