Risk Factors for Predicting Mortality and Amputation of Patients with Necrotizing Soft-Tissue Infections: Retrospective Analysis of 111 Cases from a Single Medical Center

Table 8

ROC model of NSTI patient mortality.

ROC curve	Mann−Whitney				Somers’ D (Gini)	Gamma	Tau-a	Cut-off	Sensitivity	Specificity
	AUC	SD	95% CI
Model	0.9255	0.0335	0.8599	0.9910	0.8509	0.8509	0.1533	0.042	1	0.73
WBC	0.6986	0.0788	0.5442	0.8531	0.3973	0.3991	0.0716	11.7	0.63	0.72
HCT	0.7977	0.0869	0.6275	0.9680	0.5955	0.5971	0.1073	250	0.88	0.72
Surgery	0.7477	0.0795	0.5919	0.9035	0.4955	0.9160	0.0893	—	0.545	0.950
ROC4	0.5000	0	0.5000	0.5000	0		0

NSTIs, necrotizing soft-tissue infections; ROC, receiver operating characteristics; AUC, area under the ROC curve; SD, standard derivation; CI, confidence interval; WBC, white blood cell; HCT, hematocrit.