OP0137 OPTIMIZING SUBJECT SELECTION IN KNEE OSTEOARTHRITIS CLINICAL TRIALS BY RADIOGRAPHIC JOINT SPACE WIDTH: POST-HOC CLINICAL RESPONSE ANALYSIS FROM A PHASE 2B TRIAL OF WNT PATHWAY INHIBITOR, SM04690 - Kennedy, Sarah; Swearingen, Christopher; Tambiah, Jeyanesh; Conaghan, Philip G. (Annals of the rheumatic diseases, 2019)