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Rheumatoid arthritis, its treatments, and the risk of tuberculosis in Quebec, Canada

Objective To determine the risk of tuberculosis (TB) among a cohort of patients with rheumatoid arthritis (RA) in Quebec and assess whether this risk is associated with exposure to nonbiologic disease‐modifying antirheumatic drugs (DMARDs). Methods We studied a cohort of patients with RA identified...

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Published in:Arthritis and rheumatism 2009-03, Vol.61 (3), p.300-304
Main Authors: Brassard, Paul, Lowe, Anne‐Marie, Bernatsky, Sasha, Kezouh, Abbas, Suissa, Samy
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creator Brassard, Paul
Lowe, Anne‐Marie
Bernatsky, Sasha
Kezouh, Abbas
Suissa, Samy
description Objective To determine the risk of tuberculosis (TB) among a cohort of patients with rheumatoid arthritis (RA) in Quebec and assess whether this risk is associated with exposure to nonbiologic disease‐modifying antirheumatic drugs (DMARDs). Methods We studied a cohort of patients with RA identified from the Quebec provincial physician billing and hospitalization databases for 1980–2003. TB incidence rates were determined for the period 1992–2003 and compared with the general population, standardized for age and sex using the standardized incidence ratio (SIR). Conditional logistic regression was used in a nested case–control analysis to estimate the rate ratio (RR) of TB related to nonbiologic DMARD exposure during the year before the index date. Results Of the 24,282 patients with RA in the cohort, 50 cases of TB were identified. The standardized incidence rate was 45.8 cases per 100,000 person‐years compared with 4.2 cases per 100,000 person‐years in the general population of Quebec (SIR 10.9, 95% confidence interval [95% CI] 7.9–15.0). The adjusted RR of TB was 2.4 (95% CI 1.1–5.4) with corticosteroid use and 3.0 (95% CI 1.6–5.8) with nonbiologic DMARD use. Conclusion The age‐ and sex‐standardized incidence rate of TB in RA patients is 10 times that of the general population. At least some of this risk may be related to nonbiologic DMARD and corticosteroid therapies. Our data support the role of TB screening before initiation of any immunosuppressive therapy.
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Methods We studied a cohort of patients with RA identified from the Quebec provincial physician billing and hospitalization databases for 1980–2003. TB incidence rates were determined for the period 1992–2003 and compared with the general population, standardized for age and sex using the standardized incidence ratio (SIR). Conditional logistic regression was used in a nested case–control analysis to estimate the rate ratio (RR) of TB related to nonbiologic DMARD exposure during the year before the index date. Results Of the 24,282 patients with RA in the cohort, 50 cases of TB were identified. The standardized incidence rate was 45.8 cases per 100,000 person‐years compared with 4.2 cases per 100,000 person‐years in the general population of Quebec (SIR 10.9, 95% confidence interval [95% CI] 7.9–15.0). The adjusted RR of TB was 2.4 (95% CI 1.1–5.4) with corticosteroid use and 3.0 (95% CI 1.6–5.8) with nonbiologic DMARD use. Conclusion The age‐ and sex‐standardized incidence rate of TB in RA patients is 10 times that of the general population. At least some of this risk may be related to nonbiologic DMARD and corticosteroid therapies. Our data support the role of TB screening before initiation of any immunosuppressive therapy.</description><identifier>ISSN: 0004-3591</identifier><identifier>ISSN: 0893-7524</identifier><identifier>EISSN: 1529-0131</identifier><identifier>EISSN: 1529-0123</identifier><identifier>DOI: 10.1002/art.24476</identifier><identifier>PMID: 19248128</identifier><identifier>CODEN: ARCREG</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Aged ; Antirheumatic Agents - adverse effects ; Arthritis, Rheumatoid - drug therapy ; Arthritis, Rheumatoid - immunology ; Bacterial diseases ; Biological and medical sciences ; Canada - epidemiology ; Case-Control Studies ; Cohort Studies ; Diseases of the osteoarticular system ; Female ; Human bacterial diseases ; Humans ; Immunocompromised Host ; Immunosuppressive Agents - adverse effects ; Incidence ; Infectious diseases ; Inflammatory joint diseases ; Male ; Medical sciences ; Middle Aged ; Mycobacterium ; Risk ; Tuberculosis - epidemiology ; Tuberculosis and atypical mycobacterial infections</subject><ispartof>Arthritis and rheumatism, 2009-03, Vol.61 (3), p.300-304</ispartof><rights>Copyright © 2009 by the American College of Rheumatology</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4826-9c4cc4dccd97c6b97968c64cdbecdb19ef8d872ce63061be577ae0830afd5443</citedby><cites>FETCH-LOGICAL-c4826-9c4cc4dccd97c6b97968c64cdbecdb19ef8d872ce63061be577ae0830afd5443</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27900,27901</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=21213088$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19248128$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Brassard, Paul</creatorcontrib><creatorcontrib>Lowe, Anne‐Marie</creatorcontrib><creatorcontrib>Bernatsky, Sasha</creatorcontrib><creatorcontrib>Kezouh, Abbas</creatorcontrib><creatorcontrib>Suissa, Samy</creatorcontrib><title>Rheumatoid arthritis, its treatments, and the risk of tuberculosis in Quebec, Canada</title><title>Arthritis and rheumatism</title><addtitle>Arthritis Rheum</addtitle><description>Objective To determine the risk of tuberculosis (TB) among a cohort of patients with rheumatoid arthritis (RA) in Quebec and assess whether this risk is associated with exposure to nonbiologic disease‐modifying antirheumatic drugs (DMARDs). Methods We studied a cohort of patients with RA identified from the Quebec provincial physician billing and hospitalization databases for 1980–2003. TB incidence rates were determined for the period 1992–2003 and compared with the general population, standardized for age and sex using the standardized incidence ratio (SIR). Conditional logistic regression was used in a nested case–control analysis to estimate the rate ratio (RR) of TB related to nonbiologic DMARD exposure during the year before the index date. Results Of the 24,282 patients with RA in the cohort, 50 cases of TB were identified. The standardized incidence rate was 45.8 cases per 100,000 person‐years compared with 4.2 cases per 100,000 person‐years in the general population of Quebec (SIR 10.9, 95% confidence interval [95% CI] 7.9–15.0). The adjusted RR of TB was 2.4 (95% CI 1.1–5.4) with corticosteroid use and 3.0 (95% CI 1.6–5.8) with nonbiologic DMARD use. Conclusion The age‐ and sex‐standardized incidence rate of TB in RA patients is 10 times that of the general population. At least some of this risk may be related to nonbiologic DMARD and corticosteroid therapies. 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subjects Aged
Antirheumatic Agents - adverse effects
Arthritis, Rheumatoid - drug therapy
Arthritis, Rheumatoid - immunology
Bacterial diseases
Biological and medical sciences
Canada - epidemiology
Case-Control Studies
Cohort Studies
Diseases of the osteoarticular system
Female
Human bacterial diseases
Humans
Immunocompromised Host
Immunosuppressive Agents - adverse effects
Incidence
Infectious diseases
Inflammatory joint diseases
Male
Medical sciences
Middle Aged
Mycobacterium
Risk
Tuberculosis - epidemiology
Tuberculosis and atypical mycobacterial infections
title Rheumatoid arthritis, its treatments, and the risk of tuberculosis in Quebec, Canada
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