Table 2.

Comparison of three-tier All India Institute of Medical Science Triage Protocol with Internationally available five-tier triage systems, i.e., Emergency Severity Index, Canadian Triage and Acuity Scale, Manchester Triage System and Australasian Triage Scale

ATP category	ESI category	CTAS category	MTS category	ATS category
Red	1, 2	I, II, III	1, 2	1, 2, 3
Yellow	3, 4	IV	3	4
Green	5	V	4, 5	5

ATP: All India Institute of Medical Science Triage Protocol, ESI: Emergency Severity Index, CTAS: Canadian Triage and Acuity Scale, MTS: Manchester Triage System, ATS: Australasian Triage Scale