Incidence of giant cell arteritis in Western Norway 1972–2012: a retrospective cohort study

Autor: L. K. Brekke, A. P. Diamantopoulos, B-T. Fevang, J. Aβmus, E. Esperø, C. G. Gjesdal
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Arthritis Research & Therapy, Vol 19, Iss 1, Pp 1-10 (2017)
Druh dokumentu: article
ISSN: 1478-6362
DOI: 10.1186/s13075-017-1479-6
Popis: Abstract Background Giant cell arteritis (GCA) is the most common systemic vasculitis in persons older than 50 years. The highest incidence rates of the disease have been reported in Scandinavian countries. Our objective was to determine the epidemiology of GCA in an expected high-incidence region during a 41-year period. Methods This is a hospital-based, retrospective, cohort study. Patients diagnosed with GCA in Bergen health area during 1972–2012 were identified through computerized hospital records (n = 1341). Clinical information was extracted from patients’ medical journals, which were reviewed by a standardized method. We excluded patients if data were unavailable (n = 253), if the reviewing rheumatologist found GCA to be an implausible diagnosis (n = 207) or if the American College of Rheumatology (ACR) 1990 classification criteria for GCA were not fulfilled (n = 89). Descriptive methods were used to characterize the sample. Incidence was analyzed by graphical methods and Poisson regression. Results A total of 792 patients were included. The average annual cumulative incidence of GCA was 16.7 (95% CI 15.5-18.0) per 100,000 of the population ≥ 50 years old. The corresponding incidence for biopsy-verified GCA was 11.2 (95% CI 10.2–12.3). The annual cumulative incidence increased with time in the period 1972–1992 (relative risk (RR) 1.1, p
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