ESR1 and rheumatoid arthritis: Also, the correlation between the expression of hsa_circRNA_101328 and RA clinical laboratory indexes was analyzed, and the results showed that hsa_circRNA_101328 had a significantly negative correlation with CRP and no correlation with RF, CCP, ESR, platelet aggregation, platelet count, lymphocyte count, neutrophil count, leukocyte count, lymphocyte percentage and central granulocyte percentage.