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. 2020 Feb 17;143(3):932–943. doi: 10.1093/brain/awaa021

Figure 2.

Figure 2

Flow chart depicting subgroups underlying the Parkinson’s disease participant population. At the first level, participants with Parkinson’s disease were stratified according to Montreal Cognitive Assessment (MoCA) to reveal underlying cognitive subgroups consisting of PD-Normal, PD-MCI, and PDD. Groups further stratified by Alzheimer’s disease (AD) CSF biomarkers to reveal further Parkinson's disease participant subgroups with pure Lewy Body pathology (pure LB PD), amyloid?>+ PD, amyloid?>+ tau?>+ PD, and tau?>+ PD.