Table 1.

Performance of the scores concerning mortality prediction formulas and acute physiology scores

System	ROC	HL
APACHE II mortality	0.79 ± 0.033	0.07
APACHE III mortality	0.91 ± 0.018	0.012
APACHE IV mortality	0.93 ± 0.015	0.056
APACHE II APS	0.89 ± 0.02	0.27
APACHE III APS	0.9 ± 0.022	0.75