Skip to main content

Table 2 Preoperative nocturnal breathing characteristics of examined patients

From: Sleep-disordered breathing is a risk factor for delirium after cardiac surgery: a prospective cohort study

 

All patients (n = 92)

No postoperative delirium (n = 48)

Postoperative delirium (n = 44)

P

AHI; median (IQR [range])

18.3 (8.7-32.8 [2-65])

13.2 (7.1-22.4 [2-51])

27.7 (14.0-39.7 [2-65])

0.001

AHI, n (%):

   

<0.01

<5

9 (9.8)

6 (12.5)

3 (6.8)

 

≥5

83 (90.2)

42 (87.5)

41 (93.2)

 

≥15

54 (58.7)

21 (43.8)

33 (75)

 

≥30

29 (31.5)

8 (16.7)

21 (47.7)

 

Mean oxygen saturation; mean ± SD

92.3 ± 1.8

92.5 ± 1.9

92.1 ± 1.6

0.36

Mean oxygen desaturation; mean ± SD

91.7 ± 1.9

92.2 ± 1.8

91.0 ± 1.8

<0.01

Mean minimal oxygen saturation; mean ± SD

77.9 ± 6.3

79.1 ± 5.9

76.3 ± 6.6

0.07

Measured time (in%) spent with an oxygen saturation <90%; mean ± SD

5.8 ± 11.8

4.1 ± 11.7

7.8 ± 11.8

0.17

  1. (Mean oxygen saturation describes the overall mean oxygen saturation during the night. Mean oxygen desaturation is defined as the mean decrease in oxygen saturation during apnea/hypopnea. Mean minimal oxygen saturation describes the mean values of the lowest oxygen saturation measured during the recording time. IQR, interquartile range, data in cells mean ± SD, standard deviation). AHI, apnea-hypopnea index.
Back to article page

Critical Care

ISSN: 1364-8535