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Table 1 Distinction between Parkinson’s tremor (PD) and essential tremor (ET)

From: Telemonitoring Parkinson’s disease using machine learning by combining tremor and voice analysis

Factors

PD

ET

Occurrence

Mostly at rest

Mostly during action

Frequency

Low (4–6Hz)

High (and varying)

Amplitude

High and consistent

Low to high varying

Affected-side

Unilateral

Bilateral