TY - JOUR T1 - Minimal Clinically Important Improvement of Routine Assessment of Patient Index Data 3 in Rheumatoid Arthritis JF - The Journal of Rheumatology JO - J Rheumatol SP - 27 LP - 30 DO - 10.3899/jrheum.180153 VL - 46 IS - 1 AU - Michael M. Ward AU - Isabel Castrejon AU - Martin J. Bergman AU - Maria I. Alba AU - Lori C. Guthrie AU - Theodore Pincus Y1 - 2019/01/01 UR - http://www.jrheum.org/content/46/1/27.abstract N2 - Objective. To estimate minimal clinically important improvement (MCII) of RAPID-3 (Routine Assessment of Patient Index Data 3) in rheumatoid arthritis (RA).Methods. RAPID-3 was computed before and after treatment escalation in a prospective study of adults with active RA. Patient judgment of improvement was used as the standard for a receiver-operating characteristic curve, from which MCII was estimated.Results. Mean RAPID-3 improved from 16.3 to 11.1 between visits. MCII was −3.8 based on simultaneously optimized sensitivity and specificity, −3.5 using the 0.80 specificity criterion, and −4.1 using the Youden index.Conclusion. RAPID-3 improvement of 3.8/30 units appears clinically meaningful. ER -