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Risk of Hospitalized Infection Among Rheumatoid Arthritis Patients Concurrently Treated With a Biologic Agent and Denosumab

Denosumab is a biologic agent used to treat osteoporosis. Its safety profile given concurrently with biologic drugs for rheumatoid arthritis (RA) has not been well studied. We evaluated hospitalized infections among patients treated with biologic agents for RA who initiated denosumab or zoledronic acid (ZA), a parenteral bisphosphonate without known associations with infection. We hypothesized that the rate of hospitalized infection with denosumab would be noninferior to ZA.