Your mental stimulation once you age and aren’t able to drive much is probably at a bare minimum.

There may be similar correlations between the kind of lives people living near a golf course may have led.

https://www.sciencefriday.com/segments/paraquat-parkinsons-l...

which is fair, as any other cause would show up more significantly in other populations, :owner operator grounds keepers, farmers, etc. data is scued somehow.

edit: cross corelate with prevailing winds to eliminate "sprays"