. 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 2.

Sleep latencies derived from polysomnography

	Placebo (STD)	Dexmedetomidine (STD)	Diff (95% CI)	P value
Sleep latency (mins)	23.8 (18.4)	12.6 (7.5)	11.1 (−2.6, 24.7)	0.101
Wake duration (min)	77.0 (40.2)	55.6 (32.5)	16 (−10.9, 42.9)	0.212
Sleep latency to N1 (mins)	24.8 (18.6)	13.0 (7.4)	10.6 (−3.2, 24.4)	0.117
Sleep latency to N2 (mins)	28.3 (18.4)	21.0 (12.8)	5.5 (−8.4, 19.4)	0.395
Sleep latency to N3 (mins)	49.5 (27.0)	34.8 (21.4)	−10.7 (−2, 23.4)	0.089
Sleep latency to REM (mins)	70.6 (56.6)	74.3 (88.4)	−7.4 (−96.1, 81.2)	0.837

N1, non-rapid eye movement stage 1; N2, non-rapid eye movement stage 2; N3, non-rapid eye movement stage 3; REM, rapid eye movement stage; Diff, differences in the mean of the groups.