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Table 3 Unadjusted and adjusted odds ratios of intraoperative reduction of rSO2 of each cut-offs for postoperative delirium

From: The relationship between intraoperative cerebral oximetry and postoperative delirium in patients undergoing off-pump coronary artery bypass graft surgery: a retrospective study

Intraoperative rSO2

Unadjusted OR

(95% CI)

P-values

Adjusted OR

(95% CI)

P-values

Mean

0.985 (0.957 to 1.014)

0.32

0.976 (0.942 to 1.011)

0.18

Minimum

0.987 (0.962 to 1.012)

0.30

0.977 (0.948 to 1.006)

0.12

Duration of rSO2 reduction (for every 5 min)

  < 75%

1.004 (0.997 to 1.010)

0.27

1.006 (0.999 to 1.013)

0.12

  < 70%

1.004 (0.997 to 1.010)

0.28

1.005 (0.998 to 1.012)

0.14

  < 65%

1.003 (0.997 to 1.009)

0.36

1.004 (0.997 to 1.011)

0.24

  < 60%

1.003 (0.998 to 1.008)

0.25

1.004 (0.998 to 1.010)

0.16

  < 55%

1.003 (0.998 to 1.008)

0.20

1.004 (0.999 to 0.010)

0.15

  < 50%

1.006 (1.001 to 1.011)

0.03

1.007 (1.001 to 1.014)

0.02

  < 45%

1.009 (1.001 to 1.017)

0.03

1.012 (1.003 to 1.021)

0.01

  < 40%

1.009 (0.994 to 1.025)

0.26

1.013 (0.995 to 1.030)

0.15

  < 35%

1.011 (0.986 to 1.037)

0.38

1.021 (0.990 to 1.053)

0.19

Occurrence of rSO2 reduction

  < 70%

.

1

.

1

  < 65%

1.036 (0.126 to 8.502)

0.97

.

1

  < 60%

0.858 (0.374 to 1.966)

0.72

1.460 (0.423 to 5.044)

0.55

  < 55%

0.956 (0.572 to 1.598)

0.87

0.935 (0.492 to 1.777)

0.84

  < 50%

1.427 (0.929 to 2.192)

0.11

1.599 (0.965 to 2.649)

0.07

  < 45%

1.525 (1.003 to 2.317)

0.048

1.737 (1.064 to 2.836)

0.03

  < 40%

1.077 (0.616 to 1.882)

0.80

1.236 (0.657 to 2.326)

0.51

  < 35%

0.989 (0.409 to 2.390)

0.98

0.839 (0.306 to 2.299)

0.73

  1. rSO2 Regional cerebral oxygen saturation, OR Odds ratio, CI Confidence interval