An estimated 54.4 million adults in the United States have doctor-diagnosed arthritis, according to a study by the Centers for Disease Control and Prevention (CDC). The CDC analyzed data from the 2017 Behavioral Risk Factor Surveillance System, which is a telephone survey that included over 400,000 Americans. The study, published in MMWR
(May 2019), found that about 23% of adults ages 18 and older have arthritis, with variation across the country, ranging from 15.7% in Washington, D.C. to 34.6% in West Virginia. Prevalence was generally highest in the Appalachian and Lower Mississippi Valley regions. Among adults with arthritis, about 31% reported severe joint pain and 34% said they were not physically active. People with severe joint pain were more likely to be physically inactive than those with moderate or no joint pain.