Association of intraoperative cerebral and somatic tissue oxygen saturation with postoperative acute kidney injury in adult patients undergoing multiple valve surgery

Table 3 Multivariable analysis of AUT of absolute S_rrO₂ (baseline-3 SD) and AKI

Variables	OR (95% CI)	P-value
S_rrO₂ AUT (per min%, baseline -3SD)^a	4.629 (1.238, 17.314)	0.023
Euroscore II (< 1.18 versus ≥ 1.18)	0.702 (0.276, 1.788)	0.458
Intraoperative inotropic score (< 5 versus ≥ 5)	2.228 (0.504, 9.860)	0.291
Length of CPB (< 140 min versus ≥ 140 min)	0.423 (0.168, 1.066)	0.068
Lowest MAP during CPB (per 5 mmHg increase)	0.935 (0.625, 1.398)	0.742
Torsemide during CPB (yes versus no)	0.189 (0.021, 1.724)	0.140

Abbreviations: CI confidence interval, OR odds ratio, S_rrO₂ renal region tissue oxygen saturation
The confounders included in this multivariable logistic regression are Euroscore II, intraoperative inotropic score, length of CPB, lowest MAP during CPB, and Torsemide during CPB
^aWhen using the absolute S_rrO₂ desaturation (baseline-2.5 SD) in multivariable logistic regression, the OR is 2.84 (95% CI, 1.03, 7.88; P = 0.045)

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