Table 1:

Summary of the Fahn–Tolosa–Marín Clinical Rating Scale for Tremor

Scale	Objective	Scoring (Examples of Meaning)
Part A	Quantifies tremor while holding posture, and with action/intention in nine body parts	0: None 1: Amplitude < 0.5 cm (slight, may be intermittent) 2: Amplitude 0.5–1.0 cm (moderate, may be intermittent) 3: Amplitude 1–2 cm (marked) 4: Amplitude > 2 cm (severe)
Part B	Action tremor of the upper extremities during writing, drawing, and water pouring	0: Normal 1: Mild (untidy, may cross lines, no spilling) 2: Moderate (consistent tremor but legible, crosses lines frequently, spills up to 10%) 3: Marked (illegible, great difficulty drawing, spills > 10–50%) 4: Severe (unable to keep pen on paper, complete drawing, or pour without spilling most of the water)
Part C	Functional disability, including speaking, eating, drinking, hygiene, dressing, working, and domestic tasks	0: Normal 1: Mild (spills food rarely, moves more carefully when doing tasks than the average person) 2: Moderate (unable to use spoon, able but many errors in dressing, hygiene, work tasks) 3: Marked (uses two hands to eat or for hygiene, unable to do regular job, requires assistance with dressing) 4: Severe (some words difficult to understand, needs help to feed, unable to do any fine movements, requires assistance for even gross motor tasks, unable to work)
Total	Overall assessment of severity and disability (parts A, B, and C), as well as each of clinician's and patient's subjective assessments of severity	Expressed as a percentage representing severity 1–24%: Mild disability 25–49%: Moderate disability 50–74%: Marked disability 75–100%: Severe disability

Source: Fahn et al, 1988.⁶