FIGURE 1.

Model-based prevalence* of arthritis^† among adults aged ≥18 years, by county — Behavioral Risk Factor Surveillance System, United States, 2015

Abbreviation: Q = quartile.

* Prevalence of arthritis at the county level was estimated with a multilevel regression model and poststratification approach for counties (N = 3,142) in all 50 states and the District of Columbia. Prevalence was based on the Behavioral Risk Factor Surveillance System definition of arthritis.

^† Doctor-diagnosed arthritis was defined as a yes response to the question “Has a doctor, nurse, or other health professional ever told you that you have some form of arthritis, rheumatoid arthritis, gout, lupus, or fibromyalgia?”