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Sleep quantity and quality in mechanically ventilated patients in the intensive care unit
| Variables | Intubated | Extubated | p value |
|---|---|---|---|
| Sleep duration (hr) | 5.4 ± 2.5 | 4.2 ± 2.4 | .036 |
| Sleep efficiency (%) | 58.3 ± 25.4 | 45.6 ± 24.4 | .025 |
| Wake time (hr) | 3.8 ± 2.3 | 4.9 ± 2.3 | .023 |
| Wake time after sleep onset (min) | 203 ± 126 | 259 ± 122 | .04 |
| Arousal index | 4.5 ± 2.5 | 6.6 ± 3.8 | .008 |
| Delta/theta wave ratio | 3.38 ± 0.87 | 2.79 ± 0.42 | <.001 |
