
Figure 1
The value of a staging scheme for a disease.

Figure 2
Formulating a staging scheme for essential tremor: Arguments in favor of and challenges.

Figure 3
Proposed clinical staging scheme for essential tremor.
BM: Biomarkers, EPT: Enhanced physiologic tremor, ET: Essential tremor, ET-PC: Preclinical ET, ET-PM: Premotor ET, ET-TS: ET in transitional stage, ET-Mi: Mild ET, ET-M: Moderate ET, ET-S: Severe ET, ET-EXP: ET-expansive disease stage, NMS: Non-motor symptoms.
