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Relative risks of developing rheumatoid arthritis (RA), overall and by subtype, for patients with schizophrenia. For comparison reasons, relative risks of receiving a subsequent diagnosis of ankylosing spondylitis (AS) and osteoarthritis (OA) are also shown. All data are from a Swedish nationwide population-based cohort with earliest start of follow-up in 1997. *Events among exposed/unexposed.
