Clinical and laboratory pattern of patients with systemic lupus erythematosus seropositive for rheumatoid factor.

Introduction: The aim of the study was to investigate the associations between the presence and level of rheumatoid factor (RF) in the blood serum and the clinical and laboratory characteristics of patients with systemic lupus erythematosus (SLE).

Material And Methods: This retrospective tricentric cross-sectional study analyzed a Ukrainian contingent of SLE patients. Medical records of 495 patients were evaluated.