CBS and Parkinson disease: The proportion of pTau217-positive cases significantly differed between PD-NC and the following groups: MCI [χ2(1) = 7.66; p = 0.006], PDD/DLB [χ2(1) = 5.29; p = 0.021], and PSP/CBS [χ2(1) = 6.05; p = 0.014].