: Data-Field 1110

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Data

643,204 items of data are available, covering 501,093 participants, encoded using Data-Coding 100335.
Defined-instances run from 0 to 3, labelled using Instancing 2.

Graph illustrating main data

4 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
501,053 participants, 501,053 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
20,314 participants, 20,314 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
100,917 participants, 100,917 items
Graph illustrating main data

Instance 3 : First repeat imaging visit (2019+)
20,920 participants, 20,920 items
Graph illustrating main data

Notes

ACE touchscreen question "For approximately how many years have you been using a mobile phone at least once per week to make or receive calls?"

If the participant activated the Help button they were shown the message:

Do not include time spent text messaging.
If you are unsure, please provide an estimate or select Do not know.

4 Related Data-Fields

Field ID	Description	Relationship
1140	Difference in mobile phone use compa ...	Field 1140 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to ~F11
1130	Hands-free device/speakerphone use w ...	Field 1130 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to ~F11
1150	Usual side of head for mobile phone use	Field 1150 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to ~F11
1120	Weekly usage of mobile phone in last ...	Field 1120 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to ~F11

2 Resources

Preview	Name	Res ID
	Screenshot from touchscreen questionnaire used to capture field 1110	100280
	Touchscreen questionnaire ordering, validation and dependencies	113241

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