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.