Table 6.

Appraisal of scientific evidence (according to GRADE) - Validity of 5-level triage scales measured by acute mortality.

Effect measure (endpoint)	Triage scale	No. Patients (no. Studies)	Mortality at triage level 5 (percent)	Scientific evidence	Comments
Patient mortality	CTAS	29 346 (1 study) [43]	0%	Limited ⊕⊕○○	Only one study, but large population
	ATS	127 079 (2 studies) [35,36]	0.03%-0.1%	Limited ⊕⊕○○
	METTS	8695 (1 study) [10]	0.5%	Insufficient ⊕○○○	Reduction for study quality (-1)

All the studies are observational