Data and Confidence Limits for Prevalence of Arthritis, Utah and U.S., 2000-2013
Data NotesDoctor-diagnosed arthritis was self-reported in the BRFSS and was not confirmed by a health-care provider; however, such self-reports have been shown to be acceptable for surveillance purposes. `
Age-adjusted to the U.S. 2000 standard population for comparison purposes. Age-adjusted rates are based on eight age groups: 18-24, 25-34, 35-44, 55-64, 65-74, 75-84, and 85+.
Note: At the time of this update, the BRFSS U.S. dataset did not include an age variable but did include five age categories up to age 80+ (vs. the typical weighting scheme that includes 85+). Comparisons with both weighting schemes were compared using Utah data, and the difference was about 1/100 of a percentage point.
In 2000 and 2001, the BRFSS questions were worded, "Have you ever been told by a doctor that you have arthritis?" In 2002, the wording was changed to "Have you ever been told by a doctor or other health professional that you have some form of arthritis, rheumatoid arthritis, gout, lupus, or fibromyalgia?"
Beginning in 2011, BRFSS data include both landline and cell phone respondent data along with a new weighting methodology called iterative proportional fitting, or raking. This methodology utilizes additional demographic information (such as education, race, and marital status) in the weighting procedure. Both of these methodology changes were implemented to account for an increased number of U.S. households without landline phones and an under-representation of certain demographic groups that were not well-represented in the sample. More details about these changes can be found at: http://health.utah.gov/opha/publications/brfss/Raking/Raking%20impact%202011.pdf.
Data SourcesUtah Data: Behavioral Risk Factor Surveillance System, Office of Public Health Assessment, Utah Department of Health. U.S. Data: Behavioral Risk Factor Surveillance System (BRFSS), Division of Behavioral Surveillance, CDC Office of Surveillance, Epidemiology, and Laboratory Services.
DefinitionPercentage of persons who have ever been told by a doctor or other health professional that they have some form of arthritis, rheumatoid arthritis, gout, lupus, or fibromyalgia.
How We Calculated the Rates
Date Indicator Content Last Updated: 10/21/2014