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Example of a right knee with OARSI grade 0 JSN [i.e., no medial (M) or lateral (L) JSN] and KL grade 1 [i.e., lateral tibial osteophytic lipping (arrow), but no definite osteophyte) by the centralized reading. Site investigators classified this knee as KL grade 3 and recorded OARSI grade 1 for medial JSN and grade 2 for osteophyte. The adjudicator completely agreed with the central reader and assigned OARSI grade 0 for JSN and KL grade 1
