: Data-Field 90001

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Data

112,330 bulk items are available, covering 103,568 participants.
Defined-instances run from 0 to 3, labelled using Instancing 93.

The values held within this field are coded links to files held within a bulk repository, not the actual data itself.

4 Instances

Instance 0 : Main study
103,568 participants, 103,568 items
Data not meaningful for statistical summary

Instance 1 : Seasonal repeat 1
2,632 participants, 2,632 items
Data not meaningful for statistical summary

Instance 2 : Seasonal repeat 2
3,093 participants, 3,093 items
Data not meaningful for statistical summary

Instance 3 : Seasonal repeat 3
3,037 participants, 3,037 items
Data not meaningful for statistical summary

Notes

These files contain the raw acceleration data, per participant, from a single use (over a 7-day period) of the physical activity monitor. Format is native cwa as returned by the device.

Files are typically 250MB each in the raw state and usually compress to around 100MB.

3 Related Data-Fields

Field ID	Description	Relationship
90004	Acceleration intensity time-series	Field 90004 is derived from Current Field
90002	Data problem indicator	Field 90002 indicates the quality of the data held in Current Field
90003	Start of requested wear period	Field 90003 gives the programmed starting date for the information held in Current Field

9 Resources

Preview	Name	Res ID
	Accelerometer Enclosure Differences	2070
	Accelerometer Processing Source Code	90216
	Accelerometer data body specifications	131592
	Accelerometer data header specifications	131591
	Instructions for wearing activity monitor	141141
	Large Scale Population Assessment of Physical Activity Using Wrist Worn Accelerometers in UKB	169649
	Manufacturers datasheet for AX3 monitor	138481
	Physical activity monitor : description and methods	131600
	Sample datafile of accelerometer results	131620

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