moondaughter,
I've not got aound to doing that analysis, but it needs doing.
PDMeasure contains the results, as of now, of 1024 takings of the test by people who have registered for it. See:
https://www.parkinsonsmeasurement.or...Statistics.php
(PDMeasure is my attempt to create an environment where people can give objective data on PD. And where the data is easy to access.)
You may also be interested in this thread from 2013 to 2016 on temporal epidemiology:
Temporal epidemiology
Post 14 shows a seasonal variation using Wonder mortality data from the CDC.
John