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Incidence of progressive multifocal leukoencephalopathy in patients with rheumatoid arthritis: a national population-based study
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Reumatologi.
2012 (Engelska)Ingår i: Annals of the Rheumatic Diseases, ISSN 0003-4967, E-ISSN 1468-2060, Vol. 71, nr 11, s. 1865-1867Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Cases of progressive multifocal leukoencephalopathy (PML), a rare but serious disease, have been reported in patients with rheumatoid arthritis (RA) in association with biological therapy, but little is known about the incidence of PML in patients with RA in the absence of treatment exposure.

OBJECTIVE: To estimate the incidence rate of PML in patients with RA compared with the general population, with and without exposure to biological agents.

METHODS: Patients with adult onset RA, exposure to biological agents and a diagnosis of PML from 1999 through 2009 were identified from national registries and linked using each Swedish resident's unique personal identification number. General population comparators matched on age, sex and county were also identified. Crude and age- and sex-standardised incidence rates (cases per 100 000 person-years) were calculated with 95% CI.

RESULTS: 66 278 patients with RA and 286 949 general population comparators were included in the study. The incidence rate of PML in the overall RA population was 1.0 (95% CI 0.3 to 2.5) compared with 0.3 (95% CI 0.1 to 0.6) in the general population. The difference in incidence rate was 0.7 (95% CI -0.3 to 17). Among all patients exposed to biological agents, only one patient was diagnosed with PML.

CONCLUSION: Data from this national population-based cohort study suggest that patients with RA may have an increased rate of PML compared with the general population.

Ort, förlag, år, upplaga, sidor
2012. Vol. 71, nr 11, s. 1865-1867
Nationell ämneskategori
Reumatologi och inflammation
Forskningsämne
Medicinsk vetenskap
Identifikatorer
URN: urn:nbn:se:uu:diva-301895DOI: 10.1136/annrheumdis-2012-201638PubMedID: 22739991OAI: oai:DiVA.org:uu-301895DiVA, id: diva2:955581
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Eva Baecklund ingår i the ARTIS Study Group

Tillgänglig från: 2016-08-25 Skapad: 2016-08-25 Senast uppdaterad: 2017-11-28Bibliografiskt granskad

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