In the way the study is designed, it could also be the non-using spouses having to pick up more work. Or the loss of motivation (and regular aerobic activity) by the users.
Or worsening food choices when you're high and get the munchies.
Without accounting for route of administration, this paper seems pretty worthless... almost deliberately so?
It's not totally worthless. It shows that recreational usage may lead to cardiovascular issues. Is it from the THC itself, way of administration, eating crap on munchies or having no motivation to move your ass is something for another paper.
Not worthless for the anti-cannabis lobby, I suppose.
If one person reads up how bad it is for them thanks to some random paper then it's not worthless.
Or is it a statistical artifact from crap control of confounders, who knows?