[Immunologic examination of the blood in the differential diagnosis of acute gouty arthritis and rheumatoid arthritis].

In 16 patients with acute gouty arthritis, 30 IgM RF seropositive cases of rheumatoid arthritis (RA) and 20 IgM RF seronegative cases of RA the values of 14 indicators of antibody and natural immunity were assessed in serum. The assembled data were evaluated by step-wise discrimination analysis. This made it possible to select consecutively signs important for the differentiation of acute gouty arthritis from IgM RF seropositive RA (immunocomplexes, beta-2 microglobulin, C3) and for its differentiation from IgM RF seronegative RA (IgE, C3, transferrin, free SH groups). Thus obtained classification functions make it possible to classify correctly, random subjects with a probability of 76.7-93.7%.