Associations Between Composite Host Vulnerability Score and Transfusion Outcomes After Trauma

Area of Science:

• Trauma research
• Clinical outcomes
• Hemorrhagic shock

Background:

• Traditional trauma outcomes focus on injury severity and acute physiology.
• Host vulnerability (physiologic and nutritional status) may influence bleeding and transfusion needs.
• The predictive value of host vulnerability beyond established factors is not fully understood.

Purpose of the Study:

• To assess if a composite score of host vulnerability at presentation predicts transfusion requirements in adult trauma patients.
• To determine if this score provides additional risk information beyond injury severity and acute physiologic derangement.

Main Methods:

• Retrospective cohort study of 4105 adult trauma patients.
• Host vulnerability composite score (CE) based on hypoalbuminemia, anemia, and reduced renal function.
• Logistic regression models adjusted for age, Injury Severity Score (ISS), lactate, and systolic blood pressure (SBP) to evaluate transfusion outcomes (any transfusion, massive transfusion).

Main Results:

• Transfusion requirements increased with higher CE scores (any transfusion: 21.7% to 78.6%; massive transfusion: 1.9% to 23.1%).
• Each 1-point increase in CE score was independently associated with higher odds of any transfusion (aOR 3.21) and massive transfusion (aOR 1.73).

Conclusions:

• A composite score of host vulnerability at presentation is associated with bleeding severity and transfusion needs post-trauma.
• This score offers additional risk stratification for hemorrhagic outcomes beyond established factors.
• Simple laboratory markers can aid in early risk stratification for trauma patients.