. Author manuscript; available in PMC: 2021 Dec 1.

Published in final edited form as: Anesthesiology. 2020 Dec 1;133(6):1234–1243. doi: 10.1097/ALN.0000000000003567

Table 3.

Sleep fragmentation and switch derived from PSG

	Placebo (STD)	Dexmedetomidine (STD)	Diff (95% CI)	P value
Switch	173.9 (44.7)	170.2 (64.0)	5.8 (−26.3, 38)	0.690
Switch index (per min)	0.3 (0.1)	0.3 (0.1)	0.02 (−0.03, 0.1)	0.404
Sleep fragmentation	59.1 (15.5)	58.7 (20.4)	1.9 (−10.7, 14.5)	0.746
Sleep fragmentation index (per min)	0.1 (0.01)	0.1 (0.04)	0.0 (−0.02, 0.03)	0.588

Switch, number of stage shifts; sleep fragmentation, number of shifts to a lighter stage; Diff, differences in the mean of the groups