Table 5.

Predicted in-hospital mortality rate and real in-hospital mortality rate of APACHE II, SAPS II, SOFA and ATN-ISI severity score systems on critically ill patients with acute kidney injury

Predicted mortality rate	APACHE II			ATN-ISI			SAPS II			SOFA
	Survival	Non- survival	Total	Survival	Non- survival	Total	Survival	Non- survival	Total	Survival	Non- survival	Total
<0.5	108	16	124	106	20	126	107	21	128	108	20	128
≥0.5	11	54	65	13	50	63	12	49	61	11	50	61
Total	119	70	189	119	70	189	119	70	189	119	70	189
Kappa test	0.689			0.618			0.615			0.639
P value of McNemar test	0.442			0.296			0.163			0.150

APACHE II, Acute Physiology and Chronic Health Evaluation version II; ATN-ISI, Acute Tubular Necrosis Individual Severity Index; SAPS II, Simplified Acute Physiology Score version II; SOFA, Sepsis-related Organ Failure Assessment.