Self-reported and behavioral pain assessment scales are often used interchangeably in critically ill patients due to fluctuations in mental status. The correlation between scales is not well elucidated. The purpose of this study was to describe the correlation between self-reported and behavioral pain scores in critically ill patients. Self-reported pain scale and BPS cannot be used interchangeably. Current validated BPSs may not accurately reflect self-reported pain in critically ill patients.

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