Table 5.

Prognostic performance of shock indices in different sub‐groups

	SIC in STEMI	SIC in AMI‐CS	ASI in OHCA	AMSI in OHCA
Threshold	53.57	35.36	74.12	97.98
Sensitivity (%)	65.1	80.5	42.9	41
Specificity (%)	72.8	51.1	91.3	93.2
PPV (%)	45	59	30	28
NPV (%)	52	52	52	53
Youden index	0.38	0.32	0.34	0.34
LR+	2.39	1.65	4.95	6.08
LR−	0.48	0.38	0.63	0.63

Youden index = (sensitivity + specificity) – 1.

Abbreviations: AMI‐CS, acute myocardial infarction—cardiogenic shock; AMSI, age‐modified shock index; ASI, adjusted shock index; LR, likelihood ratio; NPV, negative predictive value; OHCA, out‐of‐hospital cardiac arrest; PPV, positive predictive value; SIC, shock index‐C; STEMI, ST‐elevation myocardial infarction.