Injury Prevention Research Office, Division of Neurosurgery, St. Michael's Hospital, Toronto, Ontario, Canada.
Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
Addiction. 2023 Aug;118(8):1517-1526. doi: 10.1111/add.16188. Epub 2023 Apr 11.
To measure the impact of Canada's recreational cannabis legalization (RCL) in October 2018 and the subsequent impact of the coronavirus disease 2019 (COVID-19) lockdowns from March 2020 on rates of emergency department (ED) visits and hospitalizations for traffic injury.
An interrupted time series analysis of rates of ED visits and hospitalizations in Canada recorded in population-based databases from January/April 2010 to March 2021.
ED visits in Ontario and Alberta and hospitalizations in Ontario, Alberta, British Columbia, the Prairies (Manitoba and Saskatchewan) and the Maritimes (Nova Scotia, New Brunswick, Newfoundland and Prince Edward Island).
Monthly counts of presentations to the ED or hospital for motor vehicle injury or pedestrian/cyclist injury, used to calculate monthly rates per 100 000 population.
An occurrence of one or more International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Canada (ICD-10-CA) code for motor vehicle injury (V20-V29, V40-V79, V30-V39 and V86) and pedestrian/cyclist injury (V01-V09 and V10-V19) within the National Ambulatory Care Reporting System and Discharge Abstract Database.
There were no statistically significant changes in rates of ED visits and hospitalizations for motor vehicle or pedestrian/cyclist injury after RCL after accounting for multiple testing. After COVID-19, there was an immediate decrease in the rate of ED visits for motor vehicle injury that was statistically significant only in Ontario (level change β = -16.07 in Ontario, 95% CI = -20.55 to -11.60, P = 0.000; β = -10.34 in Alberta, 95% CI = -17.80 to -2.89, P = 0.008; α of 0.004) and no changes in rates of hospitalizations.
Canada's recreational cannabis legalization did not notably impact motor vehicle and pedestrian/cyclist injury. The rate of emergency department visits for motor vehicle injury decreased immediately after COVID-19 lockdowns, resulting in rates below post-recreational cannabis legalization levels in the year after COVID-19.
衡量加拿大 2018 年 10 月娱乐用大麻合法化（RCL）以及随后 2020 年 3 月冠状病毒病 2019（COVID-19）封锁对因交通伤而到急诊就诊和住院的发生率的影响。
利用基于人群的数据库，从 2010 年 1 月/4 月至 2021 年 3 月，对加拿大急诊就诊和住院的发生率进行中断时间序列分析。
安大略省和艾伯塔省的急诊就诊，安大略省、艾伯塔省、不列颠哥伦比亚省、草原三省（曼尼托巴省和萨斯喀彻温省）和沿海三省（新斯科舍省、新不伦瑞克省、纽芬兰和拉布拉多省以及爱德华王子岛省）的住院治疗。
每月因机动车伤或行人和/或自行车人伤到急诊就诊或住院的人数，用于计算每 10 万人的每月发生率。
在国家门诊护理报告系统和出院摘要数据库中，使用一个或多个国际疾病分类第 10 次修订版加拿大（ICD-10-CA）代码（V20-V29、V40-V79、V30-V39 和 V86）和行人和/或自行车人伤（V01-V09 和 V10-V19）来记录机动车伤和行人和/或自行车人伤的发生情况。
在 RCL 后，多次检测校正后，因机动车伤或行人和/或自行车人伤而到急诊就诊和住院的发生率没有统计学上的显著变化。在 COVID-19 之后，机动车伤的急诊就诊率立即下降，但仅在安大略省有统计学意义（安大略省的水平变化β=-16.07，95%CI=-20.55 至-11.60，P=0.000；艾伯塔省的β=-10.34，95%CI=-17.80 至-2.89，P=0.008；α=0.004），而住院率没有变化。
加拿大娱乐用大麻合法化并未显著影响机动车伤和行人和/或自行车人伤。COVID-19 封锁后，机动车伤的急诊就诊率立即下降，导致 COVID-19 后一年的急诊就诊率低于 RCL 后水平。
