Osteoarthritis (OA) is the most common form of arthritis. Three-quarters of all Americans with arthritis have OA and most Americans are expected to have OA in at least one joint by age 65.

Gillian Hawker, MD, FRCPC, is Physician-in-Chief in the Department of Medicine at Women's College Hospital in Toronto, ON is the author of this module.

This module was made possible by funding through an education grant from the Arthritis Foundation.

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