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Table 1 Polysomnography data: preoperative data, 4 months postoperative data, 12 months postoperative data

From: Hypoglossal nerve trunk stimulation: electromyography findings during drug-induced sleep endoscopy: a case report

PSG

Preoperative

4 months

Postoperative (10/29/2015)

17 months postoperative (22/11/2016)

Sleep efficiency (%)

75.4 (406 minutes)

83.9 (360 minutes)

86.9 (443 minutes)

Arousal Index

35.8 (200)

16.5 (99)

7

N1 (%)

1.9

1.7

16.4

N2 (%)

32.6

77.6

72.8

N3 (%)

49.2

20.7

6.9

REM (%)

16.2

0

4

AIH (events/hour)

24.1

7

3.9

AI (events/hour)

9.7

0

1.5

AIH REM (events/hour)

52.8

7

3.4

AIH NREM (events/hour)

18.6

7

3.9

IDR

24.1

7

3.9

O2 (%) Nadir

96

94

95

Minimum SpO2 (%)

92

89

89

T < 90% (seconds)

0

0.1

0.1

  1. N1,N2, N3 and REM are sleep stages
  2. AIH = AHI Apnea/hipopnea index, NREM non REM sleep, IDR = RDI Respiratoty dessaturation index, T < 90 time under 90%, O2 saturation