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Scatterplot showing ranked Vasculitis Damage Index (VDI) versus Combined Damage Assessment Index (CDA) scores. Patients with the same score (ties) were assigned the average rank. For example, 66 patients had a CDA score of 0. Therefore, patients 1 to 66 were assigned the rank of (1+66)/2=33.5. The next 23 patients had a CDA score of 1 (in order 67 to 89), so the rank was (67+89)/2=78, and so forth.
