What is Sleep Fragmentation?
Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. The higher the index, the more sleep is disrupted.
ActiLife calculates three values for sleep fragmentation: movement Index, a fragmentation index, and total sleep fragmentation Index.
- The Movement Index (MI) is the percentage of epochs with y-axis counts greater than zero in the sleep period.
- The Fragmentation Index (FI) is the percentage of one minute periods of sleep vs. all periods of sleep during the sleep period.
- The Total Sleep Fragmentation Index (SFI) is the sum of the MI and the FI
Sleep Fragmentation was added to ActiLife 6.12.