This french multicenter cross-sectional study took place in 11 rheumatology departments. The inter and intra-observer reproducibility for the ultrasound scoring was good to excellent. Inclusion criteria were as follows: RA meeting ACR-EULAR criteria, <15 years of progression, DAS-28-ESR<2.6 for at least 3 months, with a stable treatment including corticoids if necessary (equivalent prednisone<0.1 mg/kg) for 6 months. A standardized US examination was performed by an experience ultrasonographist blinded to clinical data. Spearman's correlation coefficients were determined between the Naredo12 B-mode (min-max,0-36), PD mode (0-36) and PDUS (0-36) scores and the different clinical remission scores. The impact of disease duration or duration of the clinical remission on ultrasound scores was also assessed (Kruskall-Wallis's test).