Table 2 Bivariate association between perioperative factors, study variables and renal outcomes^a

From: O₂ delivery and CO₂ production during cardiopulmonary bypass as determinants of acute kidney injury: time for a goal-directed perfusion management?

	AKI stage 1		AKI stage 2		Any AKI
Variable	β coefficient	P value	β coefficient	P value	β coefficient	P value
Centre (1 or 2)	0.986	0.036^b	2.034	0.001^b	1.678	0.001^b
Age (years)	0.049	0.011^b	0.020	0.142	0.035	0.004^b
Diabetes	0.762	0.057	0.346	0.345	0.611	0.037^b
EuroSCORE	0.012	0.309	0.036	0.001^b	0.034	0.001^b
Reoperation	-18.9	0.998	1.313	0.003^b	0.565	0.183
CABG and valve operation	0.709	0.085	1.103	0.001^b	1.104	0.001^b
CPB duration (minutes)	0.006	0.910	0.009	0.001^b	0.008	0.005^b
PRCs transfusion (U)	0.103	0.288	0.221	0.004^b	0.206	0.002^b
Lowest HCT during CPB	-0.075	0.147	-0.114	0.012^b	-0.111	0.003^b
Nadir DO₂ (mL/minute/m²)	-0.005	0.198	-0.012	0.001^b	-0.011	0.001^b
Peak VCO₂ (mL/minute/m²)	-0.052	0.014^b	0.030	0.090	-0.005	0.743
Nadir DO₂/VCO₂ ratio	0.136	0.433	-0.408	0.010^b	-0.192	0.119

^aAKI: acute kidney injury; β: regression coefficient; CABG: coronary artery bypass graft; CPB: cardiopulmonary bypass; HCT: hematocrit; PRCs: packed red blood cells; DO₂: oxygen delivery; VCO₂: carbon dioxide production; ^bstatistically significant P values.

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ISSN: 1364-8535

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