Table 1. Demographic data of participants.

		Count	Percentage
Age (years)	16–44	419	33.0
	45–64	399	31.5
	65–79	338	26.7
	≥80	111	8.8
	Average age (mean, SD)	54.39±19.72	54.39±19.72
Gender	Female	606	47.8
	Male	661	52.2
Type of ED	Regional ED (4th degree)	579	45.7
	Local ED (3rd degree)	668	54.3
Mode of arrival	Walking	79	6.2
	Private vehicle	753	59.4
	Public ambulance	266	21.0
	Private ambulance	155	12.2
	Other	14	1.2
Reason for visit	Injury	244	19.3
	Non-injury	1023	80.7
Underlying disease	Yes	943	74.4
	No	324	25.6
History of surgery	Yes	165	13.0
	No	1102	87.0
History of allergy	Yes	75	5.9
	No	1192	94.1
Mental states	Alert	1187	93.7
	Verbal response	39	3.1
	Pain response	28	2.2
	Unresponsive	13	1.0
Pain	Yes	714	56.4
	No	553	43.6
	Pain score by NRS (mean, SD)	4.10±1.42	4.10±1.42
Disposition	Discharge (included AMA discharge)	823	65.1
	Admission to ward	373	29.4
	Admission to ICU	8	0.6
	Transfer	32	2.5
	Surgery	22	1.7
	Death	9	0.7

ED,emergency department; NRS, numeric rating scale; KTAS, Korean Triage and Acuity Scale; ICU, intensive care unit; AMA, against medical advice