Table 1.

Multivariable analyses for any reported violence. Day Shift: 06:00–13:59; Afternoon Shift: 14:00–21:59; Overnight Shift: 22:00–05:59. CTAS = Canadian Triage Acuity Scale. Patient age categories drawn from Statistics Canada life cycle age classification.

Category	Covariate	OR	95% CI	p-Value	Decision
Dispatch Priority	Priority 3 (‘Prompt’)	1.21	0.91, 1.62	0.17	Dropped
	Priority 4 (‘Urgent’)	1.34	1.02, 1.77	0.03	Retained
Call Location Code	Other Location (Reference)
	Private Residence	0.99	0.81, 1.22	0.97	Dropped
	Store	2.02	1.42, 2.87	<0.001	Retained
	Long-Term Care Home	0.82	0.56, 1.20	0.31	Dropped
	Hotel	3.17	2.07, 4.84	<0.001	Retained
	Street/Intersection	1.91	1.50, 2.44	<0.001	Retained
	Restaurant/Bar	5.55	3.58, 8.60	<0.001	Retained
Shift	Day Shift (Reference)				Retained
	Afternoon Shift	1.52	1.30, 1.77	<0.001	Retained
	Overnight Shift	1.59	1.33, 1.90	<0.001	Retained
Acuity	CTAS 5 (Non-Urgent; Reference)				Reclassified into “High Acuity” variable (i.e., CTAS 1 or 2)
	CTAS 4 (Less Urgent)	0.66	0.85, 1.71	0.05
	CTAS 3 (Urgent)	1.20	0.85, 1.71	0.28
	CTAS 2 (Emergent)	2.02	1.41, 2.88	<0.001
	CTAS 1 (Resuscitation)	1.64	1.02, 2.66	0.04
Primary Problem Code	Other Problem (Reference)
	General Problem	1.18	0.92, 1.52	0.18	Dropped
	Intoxication	16.54	13.34, 20.48	<0.001	Retained
	Abdominal Pain	1.35	0.95, 1.93	0.09	Dropped
	Mental Health	12.71	10.29, 15.69	<0.001	Retained
	Dyspnea	1.01	0.67, 1.54	0.93	Dropped
	Trauma/Injury	2.02	1.58, 2.58	<0.001	Retained
	Chest Pain	1.58	1.09, 6.56	0.01	Retained
	Altered Mental Status	4.77	3.47, 6.56	<0.001	Retained
Patient Age	Seniors (65+ Years; Reference)
	Working Age (25–64 Years)	2.40	2.05, 2.80	<0.001	Retained
	Youth (15–24 Years)	1.69	1.31, 2.17	<0.001	Retained
	Children (0–14 Years)	0.38	0.21, 0.68	0.001	Retained