Table 2.

Prognostic performance of the third-day APACHE II in hospital mortality.

APACHE II score	Hospital mortality		90-day mortality
	Non-survivor (n)	Survivor (n)	Non-survivor (n)	Survivor (n)	Total
APACHE II ≥17	928	3,081	1,213	2,796	4,009
	Sensitivity: 92.8%	Sensitivity: 82.2%	Sensitivity: 92.2%	Sensitivity: 81.3%
	PPV: 23.1%		PPV:30.3%
APACHE II <17	288	2,077	435	1,930	2,365
	Specificity: 90.1%	Specificity: 80.2%	Specificity: 100%	Specificity: 80.2%
		NPV: 87.8%		NPV: 81.6%

APACHE II, Acute Physiology and Chronic Health Evaluation II; PPV, positive predictive value; NPV, negative predictive value.