Health research has high value to society. It can provide important information about disease trends and risk factors, outcomes of treatment, functional abilities, patterns of care, and health care costs and use. The different approaches to research provide complementary insights. Clinical trials can provide important information about the efficacy and adverse effects of medical interventions by controlling the variables that could impact the results of the study, but feedback from real-world clinical experience is also crucial for comparing and improving the use of drugs, vaccines, medical devices, and diagnostics.
Below you will find links to some of the studies that have contributed to our increased understanding of spondyloarthritis.
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Currently available U.S. population– based data for ankylosing spondylitis (AS), spondyloarthritis and inflammatory back pain (IBP) from the nationally representative U.S. National Health and Nutrition Examination Survey (NHANES) include both NHANES I(1971–1975) and NHANES II (1976 –1980) surveys. The pelvic radiographs obtained in NHANES I provided U.S. prevalence estimates for radiographic sacroiliitis, an important component of the AS case definition. AS and spondyloarthritis prevalences cannot readily be calculated from NHANES I survey data; however, IBP prevalence (Rudwaleit et al Criteria 7b) can be estimated from NHANES II. The NHANES II estimate for IBP is 0.8% of the adult population ages 25 to 49 years. The prevalence of IBP in the subset of persons with a history of a back pain episode lasting 2 or more weeks was 6.7%. The 2009 –2010 NHANES U.S. Inflammatory Back Pain/Spondyloarthritis survey is currently fielded
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