Table 4. The range of change in length of ED stay for admitted and discharged patients when each variable changed per its original unit.

	Admitted patients (n = 4,024)		Discharged patients (n = 23,946)
Characteristic	Length of stay, minutes (Unstandardized slope coefficient)	95% CI	Length of stay, minutes (Unstandardized slope coefficient)	95% CI
Mode of arrival
Walk-in	Reference		Reference
Ambulance	−41.6*	−49.4–−33.8	39.3*	25.7–42.9
Number of walk-in patients	1.6*	0.3–2.9	0.4*	0.6–0.8
Number of ambulance arrivals	0.3	−4.0–4.6	3.4*	2.2–4.7
Staff in ED
Junior resident	0.4	−1.5–2.4	1.0*	0.5–1.6
Senior resident	−1.0	−3.7–1.7	−1.9*	−2.7–−1.1
Attending physician	−6.5*	−11.8–−1.2	−4.0*	−5.6–−2.4
Nurse	0.4	−6.0–6.9	0.2	−1.5–2.0
Bed occupancy	0.1	−0.9–1.1	0.6*	0.3–0.9
ED boarding	6.1	−1.4–13.7	−0.9	−3.1–1.3
Patient age	0.5*	0.4–0.6	0.7*	0.7–0.7
Arrival
08:00–15:59	Reference		Reference
16:00–23:59	−13.6*	−22.8–−4.4	−1.8	−4.4–0.9
0:00–07:59	37.2*	26.3–48.0	2.3	−0.9–5.5
Percentage of admissions	0.4	−0.1–1.0	0.4*	0.3–0.6

*, P<0.05; 95% CI, 95% confidence intervals; ED, emergency department.