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Table 2 Sleep architecture and fragmentation during the study (16 hours)

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

Patient Stage 1 (%) Stage 2 (%) Stages 3 and 4 (%) Rapid eye movement (%) Fragmentation index
1 5 72.5 19.5 2.5 23.5
2 2.5 67 22.5 7 35.5
3 4 61 24.5 9 30.5
4 10 57 11 20 68
5 9 61 24 5.5 16.5
6 6 57 24 12.5 15
7 5 63 22 7.5 13.5
8 11 66.5 9 10.5 64.5
9 5.5 58 17.5 19 15.5
10 11 60.5 9.5 17 56.5
11 3 66 21 9 26
12 3.5 61.5 13 22 23
13 5.5 60 13 21.5 22
14 10 59 10.5 20.5 67.5
Median [25-75th percentiles] 5.5 [4-10] 61 [59-65] 18.5 [11.5-22] 11.5 [8-20] 25 [18-51]