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Predictive model variables. |
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| Data variable no. |
Data variable name |
Type of data |
Data variable categories or values |
Definition of data variable |
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| 1 |
Age |
Continuous |
Number |
The patient's age at the time of injury. |
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| 2 |
Gender |
Nominal |
1 = Female 2 = Male 3 = Unknown |
The patient's gender. |
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| 3 |
Dominating Type of Injury |
Nominal |
1 = Blunt 2 = Penetrating 3 = Unknown |
Indication of the type of injury produced by the trauma. |
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| 4 |
Mechanism of Injury |
Nominal |
1 = Traffic: motor vehicle injury (car, pickup truck, van, heavy transport vehicle, bus) 2 = Traffic: motorcycle injury 3 = Traffic: bicycle injury 4 = Traffic: pedestrian 5 = Traffic: other (ship, airplane, railway train) 6 = Shot by handgun, shotgun, rifle, other firearm of any dimension 7 = Stabbed by knife, sword, dagger, other pointed or sharp object 8 = Struck or hit by blunt object (tree, tree branch, bar, stone, human body part, metal, other) 9 = Low energy fall (fall at the same level) 10 = High energy fall (fall from a higher level) 11 = Other 12 = Unknown |
The mechanism (or external factor) that caused the injury event. The cut-off level for a fall should be defined as the person's height. |
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| 5 |
Intention of injury |
Nominal |
1 = Accident (unintentional) 2 = Self-inflicted (suspected suicide, incomplete suicide attempt, or injury attempt) 3 = Assault (suspected) 4 = Other 5 = Unknown |
Information about the role of human intent in the occurrence of an injury, primarily determined by the incident and not by the resulting injury. |
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| 6 |
Pre-injury ASA-PS Classification System |
Ordinal |
1 = A normal healthy patient 2 = A patient with mild systemic disease 3 = A patient with severe systemic disease 4 = A patient with severe systemic disease that is a constant threat to life 5 = A moribund patient who is not expected to survive without the operation 6 = A declared brain-dead patient whose organs are being removed for donor purposes 7 = Unknown |
The pre-injury co-morbidity existing before the incident. Derangements resulting from the injury should not be considered. |
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| 7 |
Pre-hospital cardiac arrest |
Nominal |
1 = No 2 = Yes 3 = Unknown |
Did the patient suffer an injury-related pre-hospital cardiac arrest? |
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| 8 |
Glasgow Coma Scale (GCS) upon arrival of EMS personnel at scene |
Ordinal |
Number |
First recorded pre-interventional GCS upon arrival at scene of medical personnel trained to assess. |
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| 9 |
GCS motor component upon arrival of EMS personnel at scene |
Ordinal |
6 = Obeys commands/appropriate response to pain 5 = Localising pain 4 = Withdrawal from pain 3 = Flexion to pain (decorticate) 2 = Extension to pain (decerebrate) 1 = No motor response |
First recorded pre-interventional GCS motor component upon arrival at scene of medical personnel trained to assess. |
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| 10 |
GCS upon arrival in ED/hospital |
Ordinal |
Number |
First recorded GCS upon arrival in the ED/hospital. |
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| 11 |
GCS motor component upon arrival in ED/hospital |
Ordinal |
6 = Obeys commands/appropriate response to pain 5 = Localising pain 4 = Withdrawal from pain 3 = Flexion to pain (decorticate) 2 = Extension to pain (decerebrate) 1 = No motor response |
Fist recorded GCS motor component upon arrival in the ED/hospital. |
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| 12a |
Systolic Blood Pressure (SBP) upon arrival of EMS personnel at scene |
Continuous |
Number |
First recorded SBP upon arrival at scene of medical personnel trained to assess. |
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| 12b |
SBP – clinical category – upon arrival of EMS personnel at scene |
Ordinal |
RTS 4 = >89 ("good radial pulse") RTS 3 = 76–89 ("weak radial pulse") RTS 2 = 50–75 ("femoral pulse") RTS 1 = 1–49 ("only carotid pulse") RTS 0 = 0 ("no carotid pulse") |
First recorded SBP upon arrival at scene of medical person trained to assess. |
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| 13a |
SBP upon arrival in ED/hospital |
Continuous |
Number |
First recorded SBP upon arrival in the ED/hospital. |
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| 13b |
SBP – clinical category – upon arrival in ED/hospital |
Ordinal |
RTS 4 = >89 ("good radial pulse") RTS 3 = 76–89 ("weak radial pulse") RTS 2 = 50–75 ("femoral pulse") RTS 1 = 1–49 ("only carotid pulse") RTS 0 = 0 ("no carotid pulse") |
First recorded SBP upon arrival in the ED/hospital. |
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| 14a |
Respiratory Rate (RR) upon arrival of EMS personnel at scene |
Continuous |
Number |
First recorded RR upon arrival at scene of medical personnel trained to assess. |
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| 14b |
RR – clinical category – upon arrival of EMS personnel at scene |
Ordinal |
RTS 4 = 10–29 ("normal") RTS 3 = >29 ("fast") RTS 2 = 6–9 ("slow") RTS 1 = 1–5 ("gasp") RTS 0 = 0 ("no respiration") |
First recorded RR upon arrival at scene of medical personnel trained to assess. |
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| 15a |
RR upon arrival in ED/hospital |
Continuous |
Number |
First recorded RR upon arrival in the ED/hospital. |
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| 15b |
RR – clinical category – upon arrival in ED/hospital |
Ordinal |
RTS 4 = 10–29 ("normal") RTS 3 = >29 ("fast") RTS 2 = 6–9 ("slow") RTS 1 = 1–5 ("gasp") RTS 0 = 0 ("no respiration") |
First recorded RR on arrival in the ED/hospital. |
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| 16 |
Arterial Base Excess |
Continuous |
Number |
First measured arterial base excess after arrival in the hospital. |
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| 17 |
Coagulation: INR |
Continuous |
Number |
Use the first measured INR within the first hour after hospital arrival. |
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| 18 |
Number of days on ventilator |
Continuous |
Number |
The total number of patient days spent on a mechanical ventilator (including all episodes). Record in full day increments with any partial day listed as a full day. |
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| 19 |
Length of stay in main hospital treating the patient |
Continuous |
Number |
Calculate 'Date of discharge' minus 'Date of admission' from the reporting hospital. |
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| 20 |
Discharge destination |
Nominal |
1 = Home 2 = Rehabilitation 3 = Morgue 4 = Another CCU (higher treatment level) 5 = Another intermediate or low care somatic hospital ward 6 = Other 7 = Unknown |
The patient's destination after end of acute care in the main hospital treating the patient. CCU = critical care unit. |
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| 21 |
Glasgow Outcome Scale – at discharge from main hospital |
Ordinal |
5 = Good Recovery 4 = Moderate Disability (Disabled but independent) 3 = Severe Disability (Conscious but disabled; depends upon others) 2 = Persistent vegetative state (unresponsive) 1 = Death 0 = Unknown |
Glasgow Outcome Scale score at discharge from main hospital. |
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| 22 |
Survival status |
Nominal |
1 = Dead 2 = Alive 3 = Unknown |
Alive or dead 30 days after injury. |
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| 23 |
Abbreviated Injury Scale (AIS) |
Ordinal |
Number |
The AIS severity codes that reflect the patient's injuries. All injuries should be listed, even duplicated codes (e.g., bilateral femoral fractures, multiple spine fractures). The edition of the AIS coding dictionary should be indexed; AIS 2005 is recommended. |
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ASA-PS: American Society of Anesthesiologists Physical Status [65]. ED: Emergency Department. EMS: Emergency Medical Services. INR: International Normalized Ratio. RTS: Revised Trauma Score [22]. | ||||
Ringdal et al. Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 2008 16:7 doi:10.1186/1757-7241-16-7 |
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