Predictive value of adding end-tidal CO₂ and perfusion index to NEWS2 for 30-day in-hospital mortality: a prospective study.

OBJECTIVE: This study aimed to evaluate whether integrating end-tidal carbon dioxide (ETCO₂) and perfusion index (PI) into the National Early Warning Score 2 (NEWS2) enhances its ability to predict 30-day in-hospital mortality in patients visitted to…

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