Table 3.

Performances of RI, MAP, PP and changes in these variables to predict a significant increase in urine output

	Threshold
	0.1 ml/kg/hour			0.2 ml/kg/hour			0.3 ml/kg/hour
Variables	AUC	p	95 % CI	AUC	p	95 % CI	AUC	p	95 % CI
RI	0.68	0.04	0.52–0.84	0.73	<0.01	0.58–0.87	0.68	0.03	0.53–0.87
MAP	0.65	0.11	0.49–0.80	0.73	0.01	0.59–0.87	0.76	0.00	0.62–0.89
PP	0.57	0.46	0.40–0.74	0.55	0.52	0.39–0.72	0.55	0.56	0.38–0.72
deltaRI	0.73	0.01	0.59–0.88	0.74	<0.01	0.60–0.88	0.73	0.01	0.59–0.88
deltaMAP	0.54	0.69	0.35–0.72	0.49	0.92	0.32–0.66	0.54	0.61	0.38–0.71
deltaPP	0.55	0.57	0.37–0.73	0.52	0.80	0.35–0.69	0.54	0.64	0.37–0.71

deltaRI, deltaMAP, deltaPP are, respectively, change in resistivity index (RI), mean arterial pressure (MAP), pulse pressure (PP). All these variables are obtained by dividing absolute change in the considered variable by its baseline value. AUC area under the curve, CI confidence interval