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  • Title: Increased prevalence of HLA-Aw19 and of the phenogroup Aw19,B18 in advanced silicosis.
    Author: Koskinen H, Tiilikainen A, Nordman H.
    Journal: Chest; 1983 Jun; 83(6):848-52. PubMed ID: 6851686.
    Abstract:
    The frequencies of HLA antigens in 27 patients with silicosis were compared with those of referents matched for exposure to silica dust, age, and sex, and having no roentgenographic signs of silicosis. A group of 900 blood donors served as an additional reference group. The prevalence of HLA-Aw19 was higher in the silicosis patients (29.6 percent) than in the silica-exposed referents (3.7 percent; p = 0.02). In turn, the frequency of Aw19 in the unexposed population consisting of blood donors (19.6 percent) was higher than that of silica-exposed referents (p = 0.04). Accepting that the prevalences of HLA antigens in the blood donors fairly well describe those of the silica-exposed population, the highest risk of developing advanced fibrosis was associated with the phenotypic combination Aw19,B18 (observed-expected ratio = 17.05; p less than 0.01). The results suggest that HLA-Aw19 and the haplotype Aw19,B18 are, at least in Finnish population, associated with a progression into advanced silicotic fibrosis.
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