Modified Hoehn and Yahr Staging Scale (H&Y)
What it measures:
The Hoehn and Yahr Scale, a widely recognized clinical tool that describes broad categories of motor dysfunction in Parkinson disease (PD), is typically administered by neurologists or movement disorder specialists. While physical therapists and other allied health professionals might use the scale to inform their treatment planning and communicate with a multidisciplinary team, they usually rely on the diagnosis and staging provided by the physician.
People with Parkinson disease (PD)
This categorical scale primarily focuses on motor symptoms, including postural instability and activity limitation, while leaving nonmotor symptoms of PD unassessed. For this reason, the scale is used to provide demographical information and can help to define inclusion and exclusion criteria in research, but has largely been replaced by the Unified Parkinson's Disease Rating Scale as an outcome measure of treatment efficiency.1
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