User Manual

4-4 Advanced Usage
Wake Threshold Selection
Selected level or method of setting the Wake Threshold. If Automatic is selected, the
Wake Threshold will be computed automatically based on activity data.
Wake Threshold Value
Thenumberofactivitycountsusedtodenewake.Detail:Levelofactivitythatis
compared to a value (x) generated by the Actiware sleep algorithm for each epoch. If
(x) is above the Wake Threshold, then the epoch is scored as wake. The higher the Wake
Threshold, the fewer the number of epochs scored as wake (See Appendix A for further
information).
Sleep Interval Detection Algorithm
Thisdeterminesthebasisforcalculatingsleeponsetandsleepend.Therstoption
uses the number of minutes scored as immobile. By selecting this option, the parameter
settings for epochs for sleep onset and sleep end can be edited. The second option uses
a number of epochs scored as sleep. By selecting this option, the parameter settings for
immobile minutes for sleep onset and epochs for sleep end can be edited. Note: This is a
means of automatically setting sleep onset and sleep end intervals, not rest intervals.
Immobile Minutes for Sleep Onset
After the start of each rest interval, the start of each sleep interval will be automatically
settotherstepochoftherstsectionofconsecutiveepochs“THIS”manyminutes
long with all but one epoch in the section scored as immobile. Note: This parameter is
only applied if the Immobile Minutes option is selected as the sleep interval detection
algorithm.
Immobile Minutes for Sleep End
Prior to the end of each rest interval, the end of each sleep interval will be automatically
set to the last epoch of the last section of consecutive epochs “THIS” many minutes
long with all but one epoch in the section scored as immobile. Note: This parameter is
only applied if the Immobile Minutes option is selected as the sleep interval detection
algorithm.
Epochs for Sleep Onset
After the start of each rest interval, the start of each sleep interval will be automatically
settotherstepochoftherstsectionofconsecutiveepochsscoredassleep“THIS”
many epochs long. Note: This parameter is only applied if the Sleep Epochs option is
selected as the sleep interval detection algorithm.
Epochs for Sleep End
Prior to the end of each rest interval, the end of each sleep interval will be automatically
set to the last epoch of the last section of consecutive epochs scored as sleep “THIS”
many epochs long. Note: This parameter is only applied if the Sleep Epochs option is
selected as the sleep interval detection algorithm.
Actogram Start Hour
The hour at which Actogram rows and daily intervals begin. This setting affects daily
interval statistics.
Illuminance Threshold
Level of illuminance, in lux, that is compared to the intensity of illumination the
Actiwatch-L is exposed to, for the purpose of calculating the Time Above Illuminance
Threshold statistic for given time intervals (Actiwatch-L only).
Analysis Parameter Denitions