Calculates the Webster Rating Scale score to assess the severity of Parkinson's disease symptoms and the degree of disability. The scale consists of 10 clinical items, each rated from 0 (Normal) to 3 (Severe impairment), yielding a total score from 0 to 30.
webster_parkinsons_scale(bradykinesia, rigidity, posture, upper_extremity_swing,
gait, tremor, facies, seborrhea, speech, self_care)A list containing:
The calculated total score (Range 0-30).
Interpretation (Early Illness <= 10, Moderate Disability 11-20, Severe/Advanced > 20).
Numeric (0-3). Slowness of movement (hands, supination-pronation rate). 0: None. 1: Slowing of supination-pronation rate. 2: Moderate slowing, early fatigue. 3: Severe slowing.
Numeric (0-3). Muscle stiffness. 0: None. 1: Slight rigidity in neck/shoulders. 2: Moderate rigidity in neck/shoulders/arms. 3: Severe rigidity.
Numeric (0-3). Standing posture. 0: Normal. 1: Beginning forward flexion of head/neck. 2: Moderate flexion (Simian posture). 3: Severe flexion.
Numeric (0-3). Arm swing during walking. 0: Both arms swing well. 1: One arm definitely diminished. 2: One arm fails to swing. 3: Both arms fail to swing.
Numeric (0-3). Walking ability. 0: Normal (stride 18-30 inches). 1: Shortened stride (12-18 inches), turning difficulty. 2: Stride 6-12 inches, shuffling, festination. 3: Onset of gait difficulty, freezing, propulsion.
Numeric (0-3). Involuntary shaking. 0: No tremor. 1: < 1 inch amplitude (hands). 2: Maximum amplitude 4 inches, severe excursion. 3: Continuous, > 4 inches, writing/feeding impossible.
Numeric (0-3). Facial expression. 0: Normal. 1: Slight masking (poker face). 2: Moderate masking (lips parted). 3: Frozen face, mouth open 1/4 inch or more, drooling.
Numeric (0-3). Oiliness of skin. 0: None. 1: Increased oiliness. 2: Obvious oiliness. 3: Marked seborrhea.
Numeric (0-3). Speech quality. 0: Clear. 1: Beginning montony/loss of volume. 2: Moderate hoarseness/monotony/dysarthria. 3: Marked hesitation/stuttering/incomprehensible.
Numeric (0-3). Independence in daily living. 0: No impairment. 1: Minor impairment (long time to dress). 2: Moderate impairment (requires help). 3: Severe impairment (cannot dress/feed self).
Webster DD. Critical analysis of the disability in Parkinson's disease. Mod Treat. 1968;5(2):257-282.
# Example 1: Moderate Disability
# Scores of 1 or 2 across domains
webster_parkinsons_scale(1, 2, 1, 2, 1, 2, 1, 0, 1, 1)
# Example 2: Severe Disease
# High scores in motor and self-care
webster_parkinsons_scale(3, 3, 3, 3, 3, 2, 3, 1, 2, 3)
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