Hoehn and Yahr Scale
Stages Parkinson disease by motor-symptom extent and postural instability.
Calculate with transparency
Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.
Preparing the form…
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Method · Limits of application
Hoehn–Yahr 1967 and modified MDS 2004 variant, including 1.5/2.5 when present; pull test
Predominantly motor staging of Parkinson’s disease, emphasizing postural instability. It does not represent nonmotor burden or a linear measure of severity. Identify the variant used; the 2004 criticism of the half-point variant is not a conclusion about all subsequent literature.
Conditions of use
Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.
Documented parameters
- Current presentation
3/3 reference cases checked. Numerical tests are not clinical validation.
Relationship with cancer research
General context — relationship to be defined
A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.