JAMA Health Forum. 2023;4(1):e225041. doi:10.1001/jamahealthforum.2022.5041
Key Points
Question  What is the association between legalization of recreational cannabis edibles and unintentional pediatric cannabis poisoning?
Findings  This cross-sectional study of all children (n = 3.4 million) aged 0 to 9 years across 4 Canadian provinces found that jurisdictions that allowed the sale of cannabis edibles experienced much larger increases in cannabis poisonings and proportions of overall poisoning hospitalizations due to cannabis than the jurisdiction that prohibited edibles.
Meaning  These findings suggest that restricting the sale of legal cannabis edibles may be a key policy to prevent unintentional pediatric cannabis poisonings following legalization.
Objective  To evaluate changes in proportions of all-cause hospitalizations for poisoning due to cannabis in children during 3 legalization policy periods in Canada’s 4 most populous provinces (including 3.4 million children aged 0-9 years).
Exposures  Prelegalization (January 2015 to September 2018); period 1, in which dried flower only was legalized in all provinces (October 2018 to December 2019); and period 2, in which edibles were legalized in 3 provinces (exposed provinces) and restricted in 1 province (control province) (January 2020 to September 2021).
Main Outcomes and Measures  The primary outcome was the proportion of hospitalizations due to cannabis poisoning out of all-cause poisoning hospitalizations. Data analysis was performed using descriptive statistics and Poisson regression models.
Results  During the 7-year study period, there were 581 pediatric hospitalizations for cannabis poisoning (313 [53.9%] boys; 268 [46.1%] girls; mean [SD] age, 3.6 [2.5] years) and 4406 hospitalizations for all-cause poisonings. Of all-cause poisoning hospitalizations, the rate per 1000 due to cannabis poisoning before legalization was 57.42 in the exposed provinces and 38.50 in the control province. During period 1, the rate per 1000 poisoning hospitalizations increased to 149.71 in the exposed provinces (incidence rate ratio [IRR], 2.55; 95% CI, 1.88-3.46) and to 117.52 in the control province (IRR, 3.05; 95% CI, 1.82-5.11). During period 2, the rate per 1000 poisoning hospitalizations due to cannabis more than doubled to 318.04 in the exposed provinces (IRR, 2.16; 95% CI, 1.68-2.80) but remained similar at 137.93 in the control province (IRR, 1.18; 95% CI, 0.71-1.97).
Conclusions and Relevance  This cross-sectional study found that following cannabis legalization, provinces that permitted edible cannabis sales experienced much larger increases in hospitalizations for unintentional pediatric poisonings than the province that prohibited cannabis edibles. In provinces with legal edibles, approximately one-third of pediatric hospitalizations for poisonings were due to cannabis. These findings suggest that restricting the sale of legal commercial edibles may be key to preventing pediatric poisonings after recreational cannabis legalization

Source: JAMA Health Forum – Health Policy, Health Care Reform, Health Affairs | JAMA Health Forum

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