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  • Title: Systemic lupus erythematosus: a review of clinico-laboratory features and immunogenetic markers in 150 patients with emphasis on demographic subsets.
    Author: Hochberg MC, Boyd RE, Ahearn JM, Arnett FC, Bias WB, Provost TT, Stevens MB.
    Journal: Medicine (Baltimore); 1985 Sep; 64(5):285-95. PubMed ID: 2412088.
    Abstract:
    Clinical and laboratory features as well as immunogenetic markers were analyzed in 150 patients with SLE to determine if demographic factors--age at diagnosis, sex and race--influenced the expression of disease. The overall series included 103 white females, 35 black females, 10 white males and 2 black males; the mean age at diagnosis was 32.5 years. Males had a significantly older mean age at diagnosis than females (40.4 versus 31.8 years) and a significantly higher frequency of peripheral neuropathy (50% versus 18.8%). No other differences in clinical or laboratory features or HLA-DR or DQ phenotype frequencies were noted. Blacks had a significant younger mean age at diagnosis than whites (26.9 versus 33.4 years) as well as significantly higher frequencies of nephritis, hypertension, acute lupus pneumonitis, discoid rash, hyperglobulinemia and hypocomplementemia. There were no differences in autoantibody frequencies between race-specific subgroups. HLA-DR2, DRw52 and DQ1 were significantly associated with SLE in whites compared to controls; no HLA-DR or DQ associations were found with SLE in blacks. In whites, HLA-DR2 was associated with the presence of anti-Ro(SS-A) antibody while HLA-DR3 was associated with the presence of both anti-Ro(SS-A) and anti-La(SS-B) antibody. In blacks, HLA-DR2 was associated with the presence of anti-nDNA antibody. In whites, patients with late-onset SLE (age at diagnosis greater than or equal to 50 years) had significantly lower frequencies of nephritis and mesenteric vasculitis but, on the other hand, a higher frequency of secondary Sjögren syndrome than patients with age at diagnosis less than or equal to 22 years. Similar findings were noted when blacks aged 35 and above were compared to those aged 17 and below at diagnosis. In whites, the frequency of both anti-Ro(SS-A) and La(SS-B) antibodies increased with increasing age as did that of HLA-DR3; HLA-DR2, however, was more frequent in those with younger age at diagnosis. These data suggest the existence of two serologic-genetic subsets of SLE with different age at diagnosis.
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