Blood Lactate Is a Useful Indicator for the Medical Emergency Team

Table 4

Prediction of 30-day mortality with lactate cut off 2.44 and 5.0 mmol/L.

Cut-off 2.44 mmol/L			Cut-off 5.0 mmol/L
	30-day mortality			30-day mortality
	No	Yes		No	Yes
Lactate ≤ 2.44 mmol/L	115	31	Lactate ≤ 5.0 mmol/L	137	52
Lactate > 2.44 mmol/L	32	33	Lactate > 5.0 mmol/L	10	12
Total	147	64	Total	147	64
		95% CI			95% CI
Sensitivity	0.52	0.40–0.63	Sensitivity	0.18	0.11–0.29
Specificity	0.78	0.71–0.84	Specificity	0.93	0.88–0.96
PPV	0.51	0.39–0.63	PPV	0.55	0.35–0.74
NPV	0.79	0.71–0.85	NPV	0.72	0.65–0.78

PPV, positive predictive value. NPV, negative predictive value.