Our new meta published as a letter in Movement Disorders, therefore no abstract. Of the published studies thus far, it appears that total protein concentration is increased in the saliva of patients with PD. We have to use a method called Standardized Mean Difference (see figure below) because of differences in the way protein concentration was measured. The next question is... what are these proteins?
Mov Disord. 2015 Nov 19. doi: 10.1002/mds.26462. [Epub ahead of print]
Masters JM, Bestwick J, Warner TT, Giovannoni G, Proctor GB, Noyce AJ.