How much did THIS study cost ?
Figures don’t lie but liars sure figure.
Pooled results of 15 investigations. Big whoop.
Meta data studies are utter nonsense and are no taken seriously by any medical or scientific journal that is peer reviewed,
You can do metadata on anything and come up with whatever you want.
For example
There has been an increase of zombie movies
the average weight of a American has increased
Hence zombie movies cause obesity