Table 5:

Univariate analysis of variables associated with the postoperative serum creatinine level increase

	Coefficient	95% CI	P-Value
Age at operation (days)	−0.002	−0.004 to −0.001	0.18
Lowest rSO2T during HFRCP (%)	−0.015	−0.027 to −0.003	0.01
Descending aortic clamp time (min)	0.008	−0.005 to −0.021	0.23
CPB time (min)	0.006	0.002 to 0.009	0.002
HFRCP flow (ml/kg/min)	0.002	−0.007 to 0.010	0.68
Serum lactate at the termination of CPB (mmol/l)	0.011	−0.002 to 0.023	0.08
Lowest haematocrit during CPB (%)	0.028	−0.071 to 0.128	0.56

CI: confidence interval; CPB: cardiopulmonary bypass; HFRCP: high-flow regional cerebral perfusion; rSO₂T: regional oxygen saturation of the thigh.