Table 2.

Tremor rating scale

	0	1	2	3	4
A – Resting tremor	absent	slight, intermittent, small amplitude, hardly disturbing, controlled by will	moderate, constant, amplitude is variable but less than 50 mm, disturbing to the subject, can be controlled by will	serious, constant, amplitude ranging from 50 to 100 mm, very disturbing for the subject, only temporarily suppressed by will	very serious, constant, over 100 mm amplitude, disabling, hardly controlled by will
B – Postural tremor (Rated with glass full to the brim)	absent	slight, intermittent, small amplitude, hardly disturbing, no spilling from glass	moderate, constant, variable amplitude but still slight, not very disturbing for the subject, intermittent and slight dripping from glass	serious, constant, average amplitude interferes with many activities, constant dripping from glass	very serious, constant, considerable amplitude, hindering activities, marked dripping from glass
C – Action tremor  C1: in alternating flexion/extension arm movements  C2: in reaching a target (index-nose test)	absent	slight, intermittent, small amplitude, hardly disturbing, controlled by will	moderate, constant, amplitude is variable but less than 50 mm, disturbing to the subject	serious, constant, amplitude ranging from 50 to 100 mm, interferes with many activities	very serious, constant, over 100 mm amplitude, hindering activities
D – Orthostatic tremor	absent	slight, intermittent, small amplitude	slight, constant, with variable oscillations	moderate, constant, average amplitude, can interfere with balance	serious, constant, with broad oscillations, can be disabling
E – Tremor of the head	absent	slight and intermittent	slight but constant, not disturbing	moderate, constant, interferes with some activities	serious, constant, interferes with most activities
F – Speech	normal	slight tremor of the voice, not steady, no difficulty in making oneself understood	slight tremor of the voice, constant, occasional difficulties in making oneself understood (rarely needs to repeat sentences)	moderate tremor of the voice, pronouncing words distinctly now and then, constant, a few incomprehensible sentences need to be repeated	serious tremor of the voice, articulating words and not very understandable
G – Writing	normal	slightly impaired, but legible	moderately impaired, but every word is legible	seriously impaired, a few words illegible	illegible
H – Overall subjective disability	absent	slight, variable	slight, constant	moderate	serious

Adapted from Deuschl (1987).