Variable
|
Baseline
|
NL
|
P
|
---|
Time in bed (min)
|
507.8 ± 21.1
|
509.6 ± 23.7
|
0.860
|
Total sleep time (min)
|
424.3 ± 25.9
|
359.2 ± 39.9
|
0.000
|
Sleep efficiency index
|
0.83 ± 0.06
|
0.71 ± 0.08
|
0.001
|
REM (%)
|
21.9 ± 3.8
|
15.8 ± 4.8
|
0.006
|
N1 (%)
|
19.6 ± 3.8
|
19.7 ± 9.8
|
0.983
|
N2 (%)
|
39.8 ± 5.1
|
47.8 ± 8.3
|
0.018
|
N3 (%)
|
18.7 ± 5.3
|
14.7 ± 4.2
|
0.078
|
Sleep onset latency (min)
|
23.4 ± 10.1
|
66.2 ± 20.7
|
0.000
|
REM latency (min)
|
147.8 ± 20.1
|
163.9 ± 55.2
|
0.399
|
No. of awakenings
|
9.9 ± 3.7
|
14.4 ± 3.3
|
0.011
|
Sleep arousals index
|
5.0 ± 1.8
|
8.7 ± 3.3
|
0.006
|
- Baseline: quiet and dark environment; NL: simulated ICU noise and light.