CD79A and rheumatoid arthritis: There were no statistically significant associations between serum anti-RgpB antibodies and RA in the univariate analyses or in the logistic regression analyses, regarding neither IgG anti-RgpB antibodies (OR = 1.001; 95% CI, 0.999–1.002; p = 0.368) nor IgA anti-RgpB antibodies (OR = 1.001; 95% CI, 1.000–1.003; p = 0.111).