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Mean difference in sensitivity, specificity, and accuracy for KL > 0, KL > 1, JSN > 0, sclerosis OARSI grade >0, sclerosis OARSI grade >1, and osteophyte OARSI grade >0. Values to the right of the vertical line at 0 are improvements by the use of KOALA. Error bars denote 95% confidence intervals. KL, Kellgren-Lawrence; JSN, joint space narrowing; OARSI, Osteoarthritis Research Society International.
