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Drug-specific risk of tuberculosis in patients with rheumatoid arthritis treated with anti-TNF therapy: results from the British Society for Rheumatology Biologics Register (BSRBR)
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Drug-specific risk of tuberculosis in patients with rheumatoid arthritis treated with anti-TNF therapy: results from the British Society for Rheumatology Biologics Register (BSRBR)
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Drug-specific risk of tuberculosis in patients with rheumatoid arthritis treated with anti-TNF therapy: results from the British Society for Rheumatology Biologics Register (BSRBR)
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Journal Article
Drug-specific risk of tuberculosis in patients with rheumatoid arthritis treated with anti-TNF therapy: results from the British Society for Rheumatology Biologics Register (BSRBR)
2010
Overview
Background The risk of tuberculosis (TB) in patients with rheumatoid arthritis (RA) is thought to be increased following anti-tumour necrosis factor (anti-TNF) therapy, with a proposed differential risk between the anti-TNF drugs etanercept (ETA), infliximab (INF) and adalimumab (ADA). Objective To compare directly the risk between drugs, to explore time to event, site of infection and the role of ethnicity. Methods Data from the British Society for Rheumatology Biologics Register (BSRBR), a national prospective observational study, were used to compare TB rates in 10 712 anti-TNF treated patients (3913 ETA, 3295 INF, 3504 ADA) and 3232 patients with active RA treated with traditional disease-modifying antirheumatic drugs. Results To April 2008, 40 cases of TB were reported, all in the anti-TNF cohort. The rate of TB was higher for the monoclonal antibodies ADA (144 events/100 000 person-years) and INF (136/100 000 person-years) than for ETA (39/100 000 person-years). After adjustment, the incidence rate ratio compared with ETA-treated patients was 3.1 (95% CI 1.0 to 9.5) for INF and 4.2 (1.4 to 12.4) for ADA. The median time to event was lowest for INF (5.5 months) compared with ETA (13.4 months) and ADA (18.5 months). 13/40 cases occurred after stopping treatment. 25/40 (62%) cases were extrapulmonary, of which 11 were disseminated. Patients of non-white ethnicity had a sixfold increased risk of TB compared with white patients treated with anti-TNF therapy. Conclusion The rate of TB in patients with RA treated with anti-TNF therapy was three- to fourfold higher in patients receiving INF and ADA than in those receiving ETA.
Publisher
BMJ Publishing Group Ltd and European League Against Rheumatism,BMJ Publishing Group,Elsevier Limited,BMJ Group
Subject
/ Antibodies, Monoclonal - adverse effects
/ Antibodies, Monoclonal, Humanized
/ Antirheumatic Agents - adverse effects
/ Arthritis, Rheumatoid - drug therapy
/ Arthritis, Rheumatoid - epidemiology
/ Biological and medical sciences
/ Clinical and Epidemiological Research
/ Disease
/ Diseases of the osteoarticular system
/ Drugs
/ Female
/ Gender
/ Humans
/ Immunoglobulin G - adverse effects
/ Male
/ Patients
/ Receptors, Tumor Necrosis Factor
/ Tuberculosis and atypical mycobacterial infections
/ Tuberculosis, Pulmonary - chemically induced
/ Tuberculosis, Pulmonary - epidemiology
