Development and Preliminary Validation of a Magnetic Resonance Imaging Joint Space Narrowing Score for Use in Rheumatoid Arthritis: Potential Adjunct to the OMERACT RA MRI Scoring System

Abstract

An MRI scoring system of JSN in RA wrist and MCP joints was developed and showed construct validity and good intra- and interreader agreements. The system may, after further validation in longitudinal data sets, be useful as an outcome measure in RA.