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• Osteoarthritis (OA) is the most common form of arthritis and the most common joint disorder, particularly of the knee.

• It is estimated that 83% of joint disorders is OA of the knee.

• It is characterized by Joint Pain and Stiffness and Functional Limitations.

• It occurs most often in people 50 years of age and older, although it may occur in younger people.

• Gender. OA is more common in males aged 50 and younger.

• However, in people 50 and older, it is more common in females, particularly after menopause.

• It is the leading cause of disability in individuals older than 70 years.

• For the older population, OA is associated with a significant decline in function and causes a higher rate of disability than any other chronic condition, including cardiovascular disease.

• The exponential rise is unique to OA as there have not been similar increase in other joint disease.