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Table 1 Calculation formulas for scoring systems

From: Prediction of pre-hospital blood transfusion in trauma patients based on scoring systems

Scoring system

Variables

Calculation

SI

(Shock Index)

Heart rate (HR)

Systolic blood pressure (SBP)

HR ÷ SBP

AGE–SI

(Age multiplied by Shock Index)

Age

Shock index

(HR ÷ SBP) ∙ Age

PP

(Pulse Pressure)

Systolic blood pressure

Diastolic blood pressure (DBP)

SBP − DBP

rSI–G

(reversed Shock Index

multiplied by GCS)

Systolic blood pressure

Glasgow Coma Scale

(SBP ÷ HR) ∙ GCS

MGAP

(Mechanism; GCS; Age;

Systolic blood pressure)

Mechanism of injury (M):

M + G + A + P

sum of points from each component

Blunt: + 4 pt

Penetrating: 0 pt

GCS (G): 3–15 pt

AGE (A):

 < 60y: + 5 pt

 > 60y: 0 pt

Systolic blood pressure (P):

 > 120 mmHg: + 5 pt

60–120 mmHg: + 3 pt

 < 60 mmHg: 0 pt