TABLE 1.

Overall Study Populations in Phase 1 vs Phase 2

	Fourth Generation	hsTnT	PValue
Total ED visits, No.	40,175	39,898	NA
ESI scorea, mean (SD)	3.07 (0.57)	3.02 (0.59)	<.001
ED inpatients, No. (%)	1,192 (3.0)	2,342 (5.9)	<.001
Visits with TnT result in ED, No. (%)	6,319 (15.7)	6,678 (16.7)	<.001
TnT results in ED, No. (%)			<.0001
1	4,645 (78.7)	3,392 (53.9)
≥2	1,257 (21.3)	2,900 (46.1)

ED, emergency department; ESI, Emergency Severity Index; hsTnT, high-sensitivity troponin T; NA, not applicable; SD, standard deviation; TnT, troponin T.

^aThe ESI is a 5-level triage algorithm that provides stratification of patients based on acuity from 1 (most urgent) to 5 (least urgent).¹³