Table 1.

Demographic data of participating EDs

Annual ED census volume
Median (IQR)	73 000 (55 000–89 900)
Participants reporting, n (%)	15 (79)
Paediatric mix (%)
Median (IQR)	2.7 (0.0–19.0)
Participants reporting, n (%)	15 (79)
Median patient age
Median (IQR)	44.7 (42.0–52.5)
Participants reporting, n (%)	9 (47)
ED admission rate (%)
Median (IQR)	27 (20–36)
Participants reporting, n (%)	15 (79)
Transfer out rate (%)
Median (IQR)	1.0 (0.9–1.1)
Participants reporting, n (%)	13 (68)
Setting, n (%)
Urban	13 (68)
Suburban	3 (16)
Rural	0
Did not respond	3 (16)
Educational affiliation, n (%)
Academic	14 (74)
Community	1 (5)
Other	1 (5)
Did not respond	3 (16)
Trauma centre designation, n (%)
Level 1	10 (52)
Level 2	2 (11)
Level 3	2 (11)
Other designated	1 (5)
Non-designated	1 (5)
Did not respond	3 (16)
ED observation unit, n (%)
None	6 (31)
Outside ED	3 (16)
Inside ED	7 (37)
Did not respond	3 (16)

ED, emergency department.