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  • Title: The clinical utility of the lupus band test.
    Author: Smith CD, Marino C, Rothfield NF.
    Journal: Arthritis Rheum; 1984 Apr; 27(4):382-7. PubMed ID: 6608947.
    Abstract:
    In order to determine the clinical utility of the lupus band test, the presence of dermal-epidermal junction (DEJ) deposits of IgG, IgM, IgA, C3, C4, Clq, and properdin were studied in biopsies of clinically normal deltoid area skin from 102 patients with systemic lupus erythematosus (SLE) and 151 patients with other rheumatic diseases. One or more proteins were detected at the DEJ in 72.6% (74 of 102) of patients with SLE and in 36.4% (55 of 151) of the other patients, yielding a specificity of 64% and a predictive value of 57%. The predictive value for the diagnosis of SLE was greatest with C4 (100%), properdin (91.3%), and IgA (86.2%) and lowest with IgM (59%). Specificity and predictive value increased with the number of proteins detected at the DEJ. The results suggest that more rigid criteria are required before diagnostic significance is attached to a positive result on the lupus band test.
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