### Description

The Probability of Death Score (PODS) was developed by Somers based on the Injury Severity Score. The author is from Odense University Hospital in Denmark.

Parameters:

(1) highest abbreviated injury scale (AIS) code (from 1 to 5)

(2) second highest AIS code (from 1 to 5)

(3) age in years

(4) correction factor C, based on the type of accident

Category Accident

Value for C

bicycle

-2.22

motorcycle with helmet

-0.812

moped with helmet

-2.70

car with seat belt

-0.764

pedestrian

-0.517

default

-1.33

where:

• The term C is derived from the proportion of fatalities in trauma patients with an AIS score from 1 to 5 (see page 252).

• Since AIS code 6 are always fatal, the score applies for AIS scores from 1 to 5.

PODS =

= (2.2 * (highest AIS code)) + (0.9 * (second highest AIS code)) - 11.25 + C

PODSa =

= PODS with age =

= (2.7 * (highest AIS code)) + (1.0 * (second highest AIS code)) + (0.06 * (age in years)) - 15.4 + C

probability of death =

= 1 / (1 + EXP((-1) * (PODS)))

probability of survival =

= 1 - (probability of death) =

= 1 / (1 + EXP(PODS))