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Means and standard deviations of Barthel Index scores at admission and discharge in the subgroups (non-PSD, PSD responders, and PSD non-responders). Non-PSD discharge vs. baseline z = −12.63, p < 0.001. PSD responders: discharge vs. baseline z = −12.77, p < 0.001. PSD non-responders: discharge vs. baseline z = −4.94, p < 0.001. (Wilcoxon Signed Ranks Test).
