CD79A and rheumatoid arthritis: The percentage of ghrelin-immune complexes also displayed significant correlations with both the clinical and metabolic parameters in RA (Figure 2); the RF and anti-CCP antibodies showed positive correlations with the IgA anti-ghrelin immune complexes percentage (r = 0.300, p = 0.042 and r = 0.372, p = 0.008, respectively) while the BMI was negatively correlated with IgG anti-ghrelin immune complexes percentage (r = −0.307, p = 0.035).