New Perspectives for Computer-Aided Discrimination of Parkinson’s Disease and Essential Tremor

Figure 8

Decision tree, induced by CHAID algorithm on the data from 27 ET and 27 PD patients. Rectangles depict neural drive (yellow) and movement (green) metrics. Red and blue ellipses depict PD and ET diagnosis, as predicted by the model. “Normalized global tremor symmetry in AO” (N7) metric discriminated 25 PD and 23 ET patients. Additional 3 ET and 2 PD patients were discriminated by “average of mean log power of all the harmonics in non-dominant tremor hand” (M2) and “normalized coefficient of variability for pairwise motor unit synchronization in AO” (N9) metrics, respectively. Three ET patients were misdiagnosed by this model.