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  • Title: HLA associations with rheumatoid arthritis in African blacks.
    Author: Mody GM, Hammond MG, Naidoo PD.
    Journal: J Rheumatol; 1989 Oct; 16(10):1326-8. PubMed ID: 2810257.
    Abstract:
    The HLA-A, B, C and DR antigens were determined in a group of 100 blacks with classical or definite rheumatoid arthritis (RA) in Durban, South Africa. Fifty-six of these patients were also tested for the DQ antigens. There was a significant association of HLA-DR4 with RA (chi 2 = 77.2; p less than 0.0001). The frequency of DR4 in RA was 44% in comparison with 10% in controls (relative risk 7.4). An unusual finding was a significant increase in the frequency of HLA-B8 in 35% of patients with RA compared to 12.5% of controls (p less than 0.001; relative risk 3.8). There was no linkage disequilibrium between DR4 and B8 to explain the latter association.
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