title: Antiperinuclear factor in Sjögren's syndrome in the presence or absence of rheumatoid arthritis.
abstract: Serum from 91 patients with Sjögren's syndrome (SS) was examined for antiperinuclear factor (APF). Nine out of 29 patients with SS alone (31.0%) were positive as opposed to 27 out of 40 with SS + rheumatoid arthritis (67.5%) and to 3 out of 22 with SS + other autoimmune disorders (13.6%). A clear relationship was established between APF and agglutinating or non-agglutinating rheumatoid factor.
mesh_terms: D000328:Adult; D000368:Aged; D000974:Antibodies, Antinuclear / Q000032:analysis / Q000276:immunology*; D001172:Arthritis, Rheumatoid / Q000150:complications / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis; D012859:Sjogren's Syndrome / Q000150:complications / Q000276:immunology*
chemical_list: D000974:Antibodies, Antinuclear; C030902:antiperinuclear factor; D012217:Rheumatoid Factor