Prognostic accuracy of point-of-care ultrasound in patients with pulseless electrical activity: a systematic review and meta-analysis

Table 3 Posttest probabilities for ROSC, SHA, and SHD for a sample of population prevalence, determined using POCUS

Pretest probability	Posttest probability after the presence of cardiac activity on POCUS	Posttest probability after the absence of cardiac activity on POCUS	False positive^*	False negative^*
ROSC (sensitivity: 0.86, specificity: 0.64)
0.1	0.21	0.02	324	14
0.25	0.44	0.07	270	35
0.5	0.71	0.17	180	70
0.75	0.88	0.39	90	105
SHA (sensitivity: 0.89, specificity: 0.73)
0.1	0.27	0.02	243	11
0.25	0.52	0.05	203	28
0.5	0.77	0.13	135	55
0.75	0.91	0.31	68	83
SHD (sensitivity: 0.79, specificity: 0.58)
0.1	0.15	0.04	378	21
0.25	0.35	0.12	315	53
0.5	0.62	0.29	210	105
0.75	0.83	0.55	105	158

ROSC Return of spontaneous circulation, SHA Survival to admission, SHD Survival to discharge, POCUS Point-of-care ultrasound
^*Number of false positives and negatives in 1000 hypothetical cases

ISSN: 1757-7241