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Table 3 Sleep outcomes: PSG-derived data, sleep time and stages

From: Characterisation of sleep in intensive care using 24-hour polysomnography: anobservational study

Outcomes

(n = 53)

Duration of PSG recording, median (IQR), hh:mm

24:00 (23:37-24:00)

TSTa, median (IQRb), hh:mm

05:00 (02:52-07:14)

Duration of sleep without waking, median (IQR), hh:mm

00:03 (00:02-00:05)

Number of sleep periods, median (IQR)

38.00 (19.00-56.50)

Sleep during daytime hours, median (IQR), %

41 (24-55)

Stage 1, median (IQR), hh:mm

01:00 (00:22-01:31)

Stage 1, median (IQR), %

19 (8-31)

Stage 2, median (IQR), hh:mm

03:03 (01:36-05:19)

Stage 2, median (IQR), %

73 (58-87)

Slow wave sleep, median (IQR), hh:mm

00:00 (00:00-00:04)c

Slow wave sleep, median (IQR), %

0 (0-1)c

REMd, median (IQR), hh:mm

00:00 (00:00-00:21)e

REM, median (IQR), %

0 (0-6)e

Arousals, median (IQR), No. per hr

27.00 (14.00-37.50)

  1. aTST, total sleep time; bIQR,interquartile range; crange = 00:00-01:58, 0-39%;dREM, rapid eye movement; erange= 00:00-01:52, 0-22%.