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  • Title: Epidemiologic and immunogenetic aspects of polymyalgia rheumatica and giant cell arteritis in northern Italy.
    Author: Salvarani C, Macchioni P, Zizzi F, Mantovani W, Rossi F, Castri C, Capozzoli N, Baricchi R, Boiardi L, Chiaravalloti F.
    Journal: Arthritis Rheum; 1991 Mar; 34(3):351-6. PubMed ID: 2003856.
    Abstract:
    We studied the epidemiology of giant cell arteritis (GCA) and polymyalgia rheumatica (PMR) in a Mediterranean population. Ninety-nine patients with PMR and/or GCA were identified over a 9-year period (1980-1988) in Reggio Emilia, Italy. The average annual incidence of PMR and GCA was 12.7/100,000 and 6.9/100,000, respectively, in a population aged 50 years or older. Frequencies of HLA antigens were determined in 49 patients with PMR and/or GCA who were followed by staff at our rheumatology unit during the 1980-1988 period. When compared with HLA findings in 242 healthy controls, DR4 was not found to be significantly associated with PMR (24% in PMR patients versus 14% in controls). Patients with GCA also showed an increased frequency of DR4 compared with controls (36% versus 14%), but this difference was also not statistically significant. The immunogenetic features of PMR and GCA and the relationship between the immunogenetic and epidemiologic patterns in different populations are discussed.
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