Identify the type of PD you mean
If you mean Parkinson’s disease, note symptoms such as tremor, stiffness, slowness, and balance problems
See a neurologist for a clinical evaluation
Review medical history and symptoms
Undergo a neurological examination
Rule out other conditions with appropriate tests
Follow the specialist’s diagnosis and treatment plan
If you mean percent difference, use the formula: |A – B| / average of A and B × 100
If you mean partial derivative, differentiate with respect to the chosen variable while treating others as constants