Table 5.

Logistic regression analysis: predictive value for each outcome variable.

Outcome variable		Odds ratio (95% CI)	P value
LOS in ICU a)	Cardiac pathology subgroup	0.85 (0.71 to 1.03)	0.12
	Baseline ScO2	0.95 (0.93 to 0.97)	< 0.001*
	Intraoperative TBBL ScO2	1.02 (1.01 to 1.03)	< 0.001*
Duration of MV b)	Cardiac pathology subgroup	0.85 (0.69 to 1.05)	0.13
	Baseline ScO2	0.92 (0.90 to 0.95)	< 0.001*
	Intraoperative TBBL ScO2	1.02 (1.01 to 1.03)	0.002*
LOS in hospital c)	Baseline ScO2	0.93 (0.91 to 0.96)	< 0.001*
	Intraoperative TBBL ScO2	1.02 (1.01 to 1.04)	< 0.001*
Mortality within first 30 postoperative days d)	Baseline ScO2	0.94 (0.91 to 0.98)	0.007**
	Intraoperative TBBL ScO2	1.03 (1 to 1.05)	0.02
	STS-EACTS score 15	1.56 (0.95 to 2.53)	0.08

a) 0.18 (Hosmer-Lemeshow), 0.06 (Cox & Snell), 0.9 (Nagelkerke). Model X² (2) = 35, P < 0.001*

b) 0.23 (Hosmer-Lemeshow), 0.09 (Cox & Snell), 0.15 (Nagelkerke). Model X² (2) = 54.2, P < 0.001*

c) 0,09 (Hosmer-Lemeshow), 0.08 (Cox & Snell), 0.13 (Nagelkerke). Model X² (3) = 42.29, P < 0.001*

d) 0.09 (Hosmer-Lemeshow), 0.08 (Cox & Snell), 0.13 (Nagelkerke). Model X² (3) = 42.29, P < 0.001*

* P is considered significant when <0.0125 (Bonferroni-correction)

** P is considered significant when <0.01 (Bonferroni-correction)

95% CI = 95% confidence interval; ICU = intensive care unit; LOS = length of stay; MV = mechanical ventilation; ScO₂ = cerebral oxygen saturation; TBBL = time below baseline ScO₂; P = significance value.