Table 5 Odds ratios of intraoperative reduction of rSO₂ of each cut-offs for postoperative delirium in patients under age 68

Mean

0.920 (0.869 to 0.975)

0.004

0.927 (0.874 to 0.984)

0.01

Minimum

0.934 (0.886 to 0.984)

0.01

0.940 (0.891 to 0.992)

0.03

  < 75%

0.999 (0.982 to 1.016)

0.87

0.997 (0.979 to 1.016)

0.78

  < 70%

1.001 (0.985 to 1.016)

0.95

0.999 (0.982 to 1.016)

0.89

  < 65%

1.005 (0.992 to 1.018)

0.48

1.003 (0.988 to 1.017)

0.73

  < 60%

1.008 (0.997 to 1.019)

0.16

1.005 (0.993 to 1.018)

0.36

  < 55%

1.011 (1.001 to 1.022)

0.03

1.012 (1.001 to 1.022)

0.04

  < 50%

1.015 (1.005 to 1.025)

0.004

1.015 (1.004 to 1.025)

0.006

  < 45%

1.016 (1.003 to 1.029)

0.02

1.015 (1.002 to 1.029)

0.02

  < 40%

1.014 (0.987 to 1.042)

0.3

1.010 (0.982 to 1.039)

0.49

  < 35%

1.017 (0.980 to 1.057)

0.37

1.011 (0.972 to 1.052)

0.59

  < 75%

.

1

.

1

  < 70%

.

1

.

1

  < 65%

.

1

.

1

  < 60%

.

1

.

1

  < 55%

4.970 (0.654 to 37.782)

0.12

4.231 (0.551 to 32.480)

0.17

  < 50%

4.156 (1.191 to 14.503)

0.03

4.013 (1.112 to 14.482)

0.03

  < 45%

2.634 (1.034 to 6.709)

0.04

2.283 (0.906 to 6.266)

0.08

  < 40%

2.662(0.971 to 7.295)

0.06

2.757(0.980 to 7.757)

0.06

  < 35%

1.114(0.141 to 8.817)

0.92

0.989(0.118 to 8.300)

0.99