Table 4.

Performance of predictors for 28-day mortality.

	SI ≥ 1.0	SIRS	SI ≥ 0.7	SIRS without WBC
Positive predictive value	0.23	0.18	0.17	0.14
Negative predictive value	0.88	0.89	0.89	0.86
Sensitivity	0.37	0.64	0.71	0.47
Specificity	0.8	0.51	0.41	0.52

SI, shock index; WBC, white blood cell; SIRS, systemic inflammatory response syndrome