Figure 1

Comparison of plasma NFL levels among groups. Plasma NFL levels were higher in the AD group compared with controls, MCI group, PDND group, and PDD group. Plasma NFL levels were also higher in the PDD group, compared with controls and the PDND group. Abbreviations: NFL, neurofilament light chain; AD, Alzheimer’s disease; MCI, mild cognitive impairment; PDND, non-demented Parkinson’s disease; PDD, Parkinson’s disease dementia.