In agreement with previous reports, CSF α‐syn levels were lower in PD than in HCs and, in classification and regression models, distinguished these groups from each other.5, 30, 31, 32 In the BioFIND cohort, CSF t‐tau levels did not differ significantly between groups, although p‐tau levels demonstrated borderline significance (P = .05). This evidence concerns the gene MAPT and Parkinson disease.