Procalcitonin decrease over 72 hours in US critical care units predicts fatal outcome in sepsis patients.

Area of Science:

• Critical care medicine
• Biomarker research
• Prognostic modeling

Background:

• Sepsis patient monitoring in ICUs requires accurate risk assessment for care decisions.
• Plasma procalcitonin (PCT) is a key biomarker for systemic bacterial infections.

Purpose of the Study:

• To evaluate if PCT kinetics in the first 72 hours of critical care enhances mortality prognostication in sepsis patients.
• To determine the added value of PCT monitoring over existing clinical risk scores.

Main Methods:

• Retrospective analysis of adult sepsis patients from two independent US critical care units.
• Examined the association between PCT concentration changes over 72 hours and patient mortality.
• Utilized logistic regression and calculated AUC for prognostic accuracy.

Main Results:

• PCT change was independently associated with ICU and in-hospital mortality (AUC 0.67-0.71).
• An 80% PCT decrease predicted low mortality (NPV 79-91%).
• No PCT decrease or increase indicated higher mortality risk (PPV 36-52%).

Conclusions:

• Procalcitonin kinetics in early critical care provide prognostic information surpassing clinical risk scores.
• PCT monitoring may aid physicians in decisions on care intensification or patient discharge from the ICU.
• Further confirmation of these findings could refine sepsis management strategies.