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CDC, partners, and outside experts agreed to use a new definition, starting in 2002. The reasons for this were many.
First, the questions used to determine both doctor-diagnosed arthritis and chronic joint symptoms were changed. A summary of the BRFSS arthritis questions from 1996 on can be found in the following document.
Because of the change in the questions and the results of
validation studies, a new case definition appeared in order. Using
doctor-diagnosed arthritis as the definition:
From 1996 to 2001, the case definition included those with doctor-diagnosed arthritis and/or those with chronic joint symptoms and labeled them “arthritis or chronic joint symptoms.”
Since 2002, CDC, partners, and outside experts have agreed on a new case definition of simply “doctor-diagnosed arthritis.”
As an interim step from 2002 to 2007 people with chronic joint symptoms but no doctor-diagnosed arthritis, were put into a category called called “possible arthritis.” CDC advised analysts to keep estimates for “possible arthritis” separate from estimates for doctor-diagnosed arthritis.
In 2009, the 2 questions on chronic joint symptoms will be dropped and replaced with other questions that address the impact of arthritis.
Page last reviewed: September 9, 2008
Page last
modified: September 9, 2008
Content Source:
Division of
Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion
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