Table 3.

Comparison Between Acute Neurological Cases as Identified by Neurological Expert Assessment and ESI

	Sensitivity	Specificity	Correctly classified	PPV	NPV
ESI acute	80.5%	65.2%	69.5%	47.3%	89.6%
Acute	94.8%	55.1%	66.2%	45.1%	96.5%

Note: ESI acute subsumes ESI categories 1 and 2, acute refers to the non-formalized retrospective neurological evaluation.

Abbreviations: ESI, Emergency Severity Index; PPV, positive predictive value; NPV, negative predictive value.