The following settings can be adjusted for PALanalysis:
validation algorithm
Adjustable criteria for the validation algorithm
Wear time protocol:
- 24 hour wear – allows 4 hours of non-wear per day
- 14 hour waking wear day – allow 10 hours of non-wear per day
- 10 hour wear day – allow 14 hours of non-wear per day
classification algorithm
The classification algorithm can be selected and parameters adjusted.
VANE
The standard PAL analysis algorithm. Classifies the data into 3 event types – non-upright, upright and stepping.
Adjustable parameters:
- minimum non-upright period – for free living data in adult populations, the default value of 10 seconds is recommended
- minimum upright period – for free living data in adult populations, the default value of 10 seconds is recommended
CREA
Extends the standard PAL analysis algorithm to provide detection of non-wear and classification of non-upright time into lying (primary and secondary) and sitting. Seated transport and cycling classification are applied. Upright correction for intermediate sitting angles is also applied.
Adjustable parameters:
- minimum non-upright period – for free living data in adult populations, the default value of 10 seconds is recommended
- minimum upright period – for free living data in adult populations, the default value of 10 seconds is recommended
Wear correction
With ‘Auto-correct inverted wear’ selected, data files where the device was worn upside down will be automatically corrected.