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In addition to the help of John Cottingham I also found this on the Internet:

Hoehn and Yahr Staging of Parkinson's Disease

    1.Stage One
           1.Signs and symptoms on one side only
           2.Symptoms mild
           3.Symptoms inconvenient but not disabling
           4.Usually presents with tremor of one limb
           5.Friends have noticed changes in posture, locomotion and facial
expression
    2.Stage Two
           1.Symptoms are bilateral
           2.Minimal disability
           3.Posture and gait affected
    3.Stage Three
           1.Significant slowing of body movements
           2.Early impairment of equilibrium on walking or standing
           3.Generalized dysfunction that is moderately severe
    4.Stage Four
           1.Severe symptoms
           2.Can still walk to a limited extent
           3.Rigidity and bradykinesia
           4.No longer able to live alone
           5.Tremor may be less than earlier stages
    5.Stage Five
           1.Cachectic stage
           2.Invalidism complete
           3.Cannot stand or walk
           4.Requires constant nursing care
Thanks John---
Jim Ryan
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