Fluid overload and changes in serum creatinine after cardiac surgery: predictors of mortality and longer intensive care stay. A prospective cohort study

Table 4 Association of selected variables with the length of ICU stay (in log days) in patients submitted to cardiac surgery (n = 502).

Variable	Multivariable analysis
	B	Beta	P
Δ creatinine (mg/dL)	0.01	0.11	0.003
Δ cumulative fluid (%)	0.17	0.55	<0.001
Age (years)	<0.01	0.07	0.061
Time of CPB (minutes)	<0.01	0.09	0.011
EuroSCORE%	<0.01	<0.01	0.994
Preoperative creatinine (mg/dL)	0.03	0.06	0.123

Δ(delta), variation (final value- initial value); b, angular coefficient; Beta, regression linear coefficient; CPB, cardiopulmonary bypass; n, number; P, statistical significance.

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