Cohort study of medical cannabis authorization and motor vehicle crash-related healthcare visits in 2014–2017 in Ontario, Canada

Table 6 Interrupted time series analysis of healthcare utilization due to motor vehicle crash one year before and one year after authorization for medical cannabis compared to those unauthorized (n = 7065)

Outcome	Authorized Medical Cannabis				Unauthorized Controls				Difference				Absolute change
	Immediate Level Change*		Temporal Trend change**		Immediate Level Change*		Temporal Trend Change**		Immediate Level Change*		Temporal Trend Change**		Combined Level and Trend Changes
	Events/ 10,000 patients	p-value	Events/ 10,000 patients	p-value	Events/ 10,000 patients	p-value	Events/ 10,000 patients	p-value	Events/ 10,000 patients	p-value	Events/ 10,000 patients	p-value	Events/ 10,000 patients	95% Confidence intervals
Motor-vehicle related hospitalization or ED visit	4.19	0.0294	0.33	0.1731	−0.84	0.7191	0.21	0.5973	4.77	0.0034	−0.11	0.5627	4.32	−0.73 to 9.37
Motor-vehicle related hospitalization	0.040	0.9728	0.15	0.3594	0.28	0.5182	−0.0082	0.8915	−0.24	0.8662	0.19	0.6389	-1.15	-14.61 to 12.63
Motor-vehicle related ED	4.82	0.0705	0.27	0.4309	−0.84	0.7191	0.21	0.5973	3.37	0.5935	0.23	0.7575	3.92	2.65 to 5.19

*change in the month following the authorization of cannabis or the index date
**change in slope in the six months following the authorization of cannabis or the index date
ED Emergency department

ISSN: 2197-1714