Skip to main content

Table 3 Comparison of sleep quality between the ventilatory modes

From: Sleep quality in mechanically ventilated patients: comparison between NAVA and PSV modes

  PSV NAVA p
Stage 1, % 7.5 [4-15] 4 [3-5] 0.006*
Stage 2, % 68 [66-75] 55 [52-58] 0.001*
Stage 3 and 4, % 16.5 [17-20] 20.5 [16-25] 0.001*
REM, % 4.5 [3-11] 16.5 [13-29] 0.001*
Fragmentation index, (n/h) 33.5 [25-54] 17.5 [8-21.5] 0.001*
Sleep efficacy, % 44 [29-73.5] 73.5 [52.5-77] 0.001*
  1. PSV = pressure support ventilation; NAVA = neurally adjusted ventilatory assist; REM = rapid eye movement; Fragmentation Index = number of arousals and awakenings per hour of sleep; Sleep efficiency = duration of sleep/total duration of recording.
  2. Values are expressed as median [interquartile range].
  3. *p < 0.05.