User Manual

2-10 Getting Started
Setting Intervals
Adding an Interval Selection to an Actogram
An interval is a user-defined selection of time that allows you to graphically
selectandanalyzedataforstatisticalcalculations.Forcalculationofstatisticsfor
specific periods of time, it is necessary to select intervals and assign an interval
type to them. The Interval feature in Actiware provides a robust data selection,
exclusion and quantitative tool. The interval types that are available:
• Rest – user defined
• Sleep – automatically determined from Rest intervals
• Active – automatically determined from Rest intervals
• Excluded – user defined
• Forced Wake Score – user defined
• Forced Sleep Score – user defined
Rest intervals
Theseareintervalsofdatathatcontainperiodsoftimewhenthesubjectactivity
islowandthesubjectislikelytobeatrest.Theymustbesetbytheuserandare
indicated on the Actogram by light blue shading. Typically this will be used for
the In Bed Period. By setting a Rest Interval you are directing the program to
apply the Sleep Interval Detection algorithm for generating Sleep Periods.
This algorithm will use the first data point in the rest interval as the Bed Time
and the last data point as the Get up Time. From these points, the Sleep Onset
and Sleep End will be set using the Analysis parameter values that are indicated
on the Analysis tab of the Tools > Options window. Once you have set a Rest
Interval, a Sleep Interval will automatically be created within it.