Correlation analysis of postoperative cognitive function and event-related potentials in patients undergoing general anesthesia.

While P300 amplitude appeared lower in the delirium group across most electrodes, these differences did not reach statistical significance ( P > 0.05) (Fig. 4 ).

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Systolic blood pressure variability also showed a trend toward significance, potentially implicating intraoperative cerebral hypoperfusion as a contributing factor.

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