
The UltraSound-CLinical ARthritis Activity (US-CLARA) index: Properties of a new composite disease activity index for rheumatoid arthritis
Keywords: ACPA; anti-citrullinated protein antibodies; ACR; American College of Rheumatology; AUC; area under the curve; BMI; body mass index; CDAI; Clinical Disease Activity Index; CI; confidence interval; CRP; C-reactive protein; DAS28; disease activity score-28