Cannabis is the most-used psychoactive drug in Aotearoa—New Zealand (NZ); recreational use remains illegal, while medicinal use was legalized in 2020. Cannabis use is associated with increased risk of injury; however, there is little known on the causes and circumstances of cannabis-related fatal injuries. This retrospective population study utilized coronial case files to describe the contribution and circumstances of cannabis-related fatal injuries in NZ. Between 2012 and 2016, cannabis was reported in 273 of 3599 unintentional/assault injury deaths (1.32 deaths per 100,000 person-years, 95% CI 1.17, 1.49). High-risk groups included males aged 15–44 years, Indigenous Māori, and those in deprived areas, for whom higher rates of post mortem testing were conducted. Cannabis-related fatalities mainly resulted from road crashes and multi-drug poisonings with concomitant alcohol use common, especially in traffic crashes on public roads (49% of concomitant use). Cannabis use was mainly observed in the decedent (n = 256, 94%). One in five deaths involved a worker, either as a user or as a bystander to another’s use. Coronial files identified important opportunities for safety countermeasures targeting cannabis use among drivers and its concomitant use with alcohol. Improved coverage of post mortem testing could address data limitations, including biased testing patterns and missing medical use.
Lilley et al. (Sun,) studied this question.