New research reveals that only a minority of U.S. Medicare beneficiaries with knee osteoarthritis in 2005-2010 used non-surgical care such as physical therapy and knee injections, and few were treated by rheumatologists, physiatrists, or pain specialists. The study, which is published in Arthritis & Rheumatology, also found that non-surgical care was more common in regions with low rates of knee replacement surgery.