Lactate on emergency department arrival as a predictor of in-hospital mortality in necrotizing fasciitis: a retrospective study

Table 4 Predicting performance of ED blood lactate and SOFA score for in-hospital mortality of NF

	AUC	95% CI	P value	Optimal cutoff value	Sensitivity (%)	Specificity (%)
Blood lactate	0.79	0.74–0.84	< 0.001	5.8 mmol/l	62	86
SOFA score	0.82	0.78–0.86	< 0.001	7.2	67	83
Blood lactate combined with SOFA score	0.86	0.83–0.90	< 0.001		64	93

P value (comparison of the difference between AUCs)
P = 0.218 (between blood lactate and SOFA score)
P = 0.115 (between blood lactate combined with SOFA score and SOFA score alone)
P = 0.008 (between blood lactate combined with SOFA score and blood lactate alone)
AUC area under the receiver-operating-characteristic curve, CI confidence interval, SOFA sequential organ failure assessment

ISSN: 1749-799X