AGBL3 and rheumatoid arthritis: We performed pairwise comparisons of antibodies as levels to individual antigens as well as means of summed levels of antibodies to groups of similar antigens (e.g., levels of antibodies to all fibrinogen-containing antigens) between At-Risk and anti-CCP3(−) Controls, and At-Risk and Early RA participants in analyses that were adjusted for age, sex and smoking status (Supplementary Data 3).