15 second epochs csv

The 15 second epochs csv file summarises the events which occur in each 15 second time slice.

Column HeadingDescription
TimeDate and time encoded as a floating point number, The integer part of number represents the date. The decimal portion represents the time.
(Full details at: http://support.microsoft.com/kb/210276)

To view the time in Excel, follow this these instructions
Step CountNumber of steps counted in the 15 second period
Activity ScoreActivity score in MET.s in the 15 second period
Sedentary TimeNumber of seconds sedentary in the 15 second period
Upright TimeNumber of seconds upright in the 15 second period (Note: this is the time spent standing and stepping)
Stepping TimeNumber of seconds stepping in the 15 second period (Note: this time is also included in the upright time)
Cycling TimeNumber of seconds cycling in the 15 second period (Note: this time is also included in the upright time)
Primary Lying Time(CREA algorithm only) Number of seconds of primary lying in the 15 second period
Secondary Lying Time(CREA algorithm only) Number of seconds of secondary lying in the 15 second period
Non Wear Time(CREA algorithm only) Number of seconds of non-wear in the 15 second period
Seated Transport TimeNumber of seconds in seated transport in the 15 second period (Note: this time is included in the sedentary time)
Sedentary to Upright MovementsNumber of sit to stands in the 15 second period
Upright to Sedentary MovementsNumber of stand to sits in the 15 second period
Sum(abs(dChannel1))Sum of the absolute sample to sample differences on the x axis in the 15 second period
Sum(abs(dChannel2))Sum of the absolute sample to sample differences on the y axis in the 15 second period
Sum(abs(dChannel3))Sum of the absolute sample to sample differences on the z axis in the 15 second period

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