Figure 2From: Risk factors for ANA positivity in healthy personsSerum antibody levels measured by ELISA in RA patients and community-derived control subjects. ANA levels in RA patients from DRADR (L panel) were significantly higher in females than in males. By contrast, CCP antibodies measured in individuals from the Dallas Heart Study (middle panel) or in DRADR RA patients (right panel) did not show significant male-female differences.Back to article page