Table 2 Polysomnographic data.

From: Nocturnal hypoxemia is related to morning negative affectivity in untreated patients with severe obstructive sleep apnea

 

Control

Mild to moderate OSA

Severe OSA

p value

TST (min)

492.7 ± 113.1

465.5 ± 139.9

493.5 ± 87.6

0.7684

Sleep efficiency (%)

82.5 ± 17.8

83.4 ± 11.4

80.3 ± 11.4

0.8293

Stage N1 (%)

10.9 ± 4.4

17.8 ± 9.3

34.3 ± 15.9

 < 0.0001*

Stage N2 (%)

46.0 ± 11.8

51.1 ± 12.9

45.0 ± 13.8

0.3856

Stage N3 (%)

13.6 ± 8.7

6.8 ± 6.7

4.1 ± 4.2

0.0056*

Stage REM (%)

14.4 ± 7.4

17.9 ± 6.8

15.2 ± 4.7

0.3054

AHI (/h)

1.9 ± 1.3

15.9 ± 7.6

56.0 ± 23.2

 < 0.0001*

Arousal index (/h)

15.9 ± 7.4

17.7 ± 9.0

37.1 ± 19.2

0.0097*

Min SpO2 (%)

92.2 ± 1.7

87.4 ± 4.7

73.1 ± 11.0

 < 0.0001*

CT90 (%)

0.0 ± 0.0

0.1 ± 0.3

11.7 ± 12.6

 < 0.0001*

PLM index (/h)

3.3 ± 4.5

1.4 ± 2.3

2.3 ± 3.4

0.3475

  1. AHI, apnea-hypopnea index; CT90, percentage of cumulative time of blood oxygen saturation below 90% during sleep; Min SpO2, minimum saturation of percutaneous oxygen; OSA, obstructive sleep apnea; PSG, polysomnography; PLM, periodic limb movement; TST, total sleep time; *, p < 0.05.
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