I think this raises the challenge of trying to interpret any evidence of risk. I think you need to be careful when you make assumptions that the evidence is clear that there are risks. It's not just whether or not there's a risk. It's the magnitude of the risk and it is the factors that contribute to that risk.
In the case of mental health, what became clear to us from a number of positions, the CMA, the Canadian Paediatric Society, as well as the psychiatric associations and other perspectives that were taken into account, was that the association between cannabis use and mental health issues on a wide range of scales is attenuated by a number of other things, not just the cannabis itself.
I have already talked about potency issues, which are not factored into many of these discussions, but the age of onset, the frequency of use, the modality of consumption, and the socio-economic factors surrounding the individual who is using cannabis at an early age all contribute to elements of the risk equation. Different studies factor these confounding elements in different ways. Even when you speak to the experts, the medical associations and the pediatric associations are looking at a broad evidence base, and the danger is summarizing into one line a very complex body of evidence. They are summarizing things and making position statements based on a review of evidence. When you speak to the people who actually do those studies, you very quickly realize they are limited by the interpretation of some of those findings because of the differences in methodology, the differences in reporting, who uses, who reports use, and how they report the amount of use.
With all of that said, that's what I mean by the lack of high-quality evidence and why it's so important that we get a better handle on what people are using, how much they use, and when they use, and that we build our education programs to minimize those risks, not just of the drug itself but of the social economics and the social determinants of the people. Why are they choosing to use cannabis when they're 13 years old? That is something that we need to be looking at.