This is “Seshet’s” ongoing thread that’s very similar to what I do here: finding and reporting on the latest opioid-related articles. He’s a self-described “math nerd” with a scientific background, so his analysis of these articles is based on hard facts, not sentiments or speculation.
More fascinating research from NIDA. Seems that drug initiation is seasonal.
For more such “spurious correlations” see a previous post of that very name which a list of countless correlations of completely unrelated variables: “Spurious Correlations“.