The number of people expected to have doctor-diagnosed arthritis by the year 2040: more than 78 million. Arthritis is the leading cause of disability among adults in the U.S. (Barbour 2013)
More than half of all people with symptomatic knee osteoarthritis (OA) are younger than age 65 and will live for three decades or more after diagnosis. For these people, there is substantially more time for greater disability to occur. (Deshpande 2016).
Approximately 20 percent of U.S. adults had chronic pain and 8 percent had high-impact chronic pain—meaning pain that limited at least one major life activity—in 2016.