Table 2.

Description of presented sleep parameters according to the Actiwatch user manual V 7.2 and [20].

Sleep Parameter	Description
Actual sleep (%) Actual wake (%)	The time actually spent sleeping or waking, respectively.
Sleep efficiency (%)	Index of the amount of time in bed spent sleeping.
Sleep bouts Wake bouts	The actual number of episodes of sleep and of wakefulness, respectively.
Immobile time (%) Moving time (%)	Percentage value comparing the time spent immobile or moving during the assumed sleep period, respectively.
One-min immobility (%)	The percentage of immobility lasting 1 min or less in relation to the total number of immobility phases.
Fragmentation index (%)	Indicator of restlessness, calculated by the sum of moving minutes and immobility phases shorter than 1 min.