The authors reported that statin use was significantly associated with higher PD risk. The association was highest for fat soluble (lipophilic) statins. This association was most pronounced for the initial stage of statin treatment, which the authors surmised was an effect of statins "unmasking" the onset of preclinical Parkinson's.
Movement Disorder, 2017
DOI: 10.1002/mds.27053 , PMID: 28556203
Linking statins and lipids in Parkinson's disease. - PubMed - NCBI
(and the question continues....This was a retrospective case control analysis)