Table 2. Differences in the areas under the ROC curves of PCT, SAA, CRP, and IL-6 for predicting AKI.

	PCT	SAA	CRP	IL-6
PCT	\	0.429(0.294,0.560)	0.147 (0.058,0.236)	0.221 (0.111,0.331)
		P<0.001*	P<0.001*	P<0.001*
SAA	\	\	0.28 (0.123,0.437)	0.206 (0.036,0.376)
			P<0.001*	P = 0.017*
CRP	\	\	\	0.074 (0.064,0.212)
				P = 0.293
IL-6	\	\	\	\

% confidence interval) between two indicators. * = P<0.05 according to the Mann-Whitney U Test. Results are presented as mean area difference (95

 = procalcitonin; SAA = serum amyloid A; CRP =  C-reactive protein; IL-6 = interleukin-6. PCT