Table 2.
Original TETRAS and WHIGET Numerical Scale Values, and Corresponding Four and Two Level Tremor Severity Categories.
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| ORIGINAL TETRAS SCALE VALUE | CORRESPONDING FOUR LEVEL TETRAS TREMOR SEVERITY CATEGORY | CORRESPONDING TWO LEVEL TETRAS TREMOR SEVERITY CATEGORY | ORIGINAL WHIGET SCALE VALUE | CORRESPONDING FOUR LEVEL WHIGET TREMOR SEVERITY CATEGORY | CORRESPONDING TWO LEVEL WHIGET TREMOR SEVERITY CATEGORY |
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| 2A. POSTURAL TREMOR | |||||
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| 0.0 No tremor | 1 (none) | 1 (none/mild) | 0.0 Absolutely no visible tremor | 1 (none) | 1 (none/mild) |
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| 1.0 Tremor is barely visible | 2 (mild) | 1 (none/mild) | 0.5 Very low amplitude and almost never present | 2 (mild) | 1 (none/mild) |
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| 1.5 Tremor is visible, but <1 cm amplitude | 2 (mild) | 1 (none/mild) | 1.0 Low amplitude tremor OR intermittent tremor | 2 (mild) | 1 (none/mild) |
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| 2.0 Tremor is 1–<3 cm amplitude | 3 (moderate) | 2 (moderate/severe) | 1.5 Moderate amplitude AND clearly oscillatory, but only sometimes of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 2.5 Tremor is 3–<5 cm amplitude |
4 (severe) | 2 (moderate/severe) | 2.0 Moderate amplitude [1–2 cm] AND clearly oscillatory AND usually of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 3.0 Tremor is 5–<10 cm amplitude |
4 (severe) | 2 (moderate/severe) | 3.0 Large amplitude | 4 (severe) | 2 (moderate/severe) |
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| 3.5 Tremor is 10–<20 cm amplitude |
4 (severe) | 2 (moderate/severe) | |||
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| 4.0 Tremor is >20 cm amplitude | 4 (severe) | 2 (moderate/severe) | |||
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| 2B. KINETIC TREMOR – FINGER-NOSE-FINGER MANEUVER | |||||
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| 0.0 No tremor | 1 (none) | 1 (none/mild) | 0.0 Absolutely no visible tremor | 1 (none) | 1 (none/mild) |
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| 1.0 Tremor barely visible | 2 (mild) | 1 (none/mild) | 0.5 Very low amplitude and almost never present | 2 (mild) | 1 (none/mild) |
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| 1.5 Tremor visible, but <1 cm amplitude | 2 (mild) | 1 (none/mild) | 1.0 Low amplitude tremor OR intermittent tremor | 2 (mild) | 1 (none/mild) |
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| 2.0 Tremor is 1–<3 cm amplitude |
3 (moderate) | 2 (moderate/severe) | 1.5 Moderate amplitude AND clearly oscillatory, but only sometimes of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 2.5 Tremor is 3–<5 cm amplitude |
4 (severe) | 2 (moderate/severe) | 2.0 Moderate amplitude [1–2 cm] AND clearly oscillatory AND usually of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 3.0 Tremor is 5–<10 cm amplitude | 4 (severe) | 2 (moderate/severe) | 3.0 Large amplitude | 4 (severe) | 2 (moderate/severe) |
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| 3.5 Tremor is 10–<20 cm amplitude | 4 (severe) | 2 (moderate/severe) | 4.0 Extremely large tremor | 4 (severe) | 2 (moderate/severe) |
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| 4.0 Tremor is >20 cm amplitude | 4 (severe) | 2 (moderate/severe) | |||
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| 2C. KINETIC TREMOR – ARCHIMEDES SPIRAL | |||||
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| 0 Normal | 1 (none) | 1 (none/mild) | 0.0 Absolutely no visible tremor | 1 (none) | 1 (none/mild) |
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| 1 Slight; tremor barely visible | 2 (mild) | 1 (none/mild) | 0.5 Very low amplitude and almost never present | 2 (mild) | 1 (none/mild) |
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| 2 Mild; obvious tremor | 3 (moderate) | 2 (moderate/severe) | 1.0 Low amplitude tremor OR intermittent tremor | 2 (mild) | 1 (none/mild) |
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| 3 Moderate; portions of figure not recognizable | 4 (severe) | 2 (moderate/severe) | 1.5 Moderate amplitude [1–2 cm] AND clearly oscillatory but only sometimes of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 4 Severe; figure not recognizable | 4 (severe) | 2 (moderate/severe) | 2.0 Moderate amplitude AND clearly oscillatory and usually of moderate amplitude | 3 (moderate) | 2 (moderate/severe) |
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| 3.0 Large amplitude | 4 (severe) | 2 (moderate/severe) | |||
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| 4.0 Extremely large amplitude | 4 (severe) | 2 (moderate/severe) | |||
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