As expected, the plasma Aβ42/40 ratio was decreased, and both P-tau species were increased in amyloid positive DLB individuals, as defined by CSF Aβ42, indicating plasma Aβ42/40 ratio, P-tau181, and P-tau231 to be suitable, less invasive markers to assess amyloid copathology. Here, MAPT is linked to Lewy body dementia.