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Spearman correlation coefficients of recovery scores captured by the Upper Extremity section of the Fugl-Meyer scale (UE-FM), Chedoke Arm and Hand Activity Inventory (CAHAI), and Barthel Index (BI), for each chronicity quartile. Q1 (2–39 days), Q2 (39–430 days), Q3 (439–1,198 days), and Q4 (1,198–5,844 days). Dashed horizontal lines indicate significance thresholds.
