This study will investigate disparities in neurocognitive impairment (NCI) among Hispanics/Latinos/as/x (henceforth Hispanics) living in the US-Mexico borderland of California or in North Carolina with Parkinson's Disease (PD) and determine mechanisms underlying these disparities. NCI is an important aspect of the clinical course of PD, particularly among Hispanics, who have increased prevalence of dementia. Among the many potential factors driving this disparity, the investigators chose to focus on a modifiable risk factor to which Hispanics are particularly vulnerable, and that has been linked to increased NCI, namely cardiovascular (CVD) risk (e.g., diabetes, hypertension, obesity).