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. Author manuscript; available in PMC: 2013 Jul 19.
Published in final edited form as: J Trauma. 2011 Aug;71(2):299–305. doi: 10.1097/TA.0b013e318224d328

Table 1.

Model Covariates

Primary Covariates
 Total PRBC administered 0-12 hrs. (U) continuous
 Total FFP administered 0-12 hrs. (U) continuous
 Total Crystalloid administered 0-12 hrs. (L) continuous
Secondary Covariates
 Age continuous
 Gender male/female
 New Injury Severity Score (NISS) continuous
 AIS Head region ≥3 yes/no
 AIS Abdomen region ≥3 yes/no
 AIS Thorax region ≥3 yes/no
 AIS Extremity region ≥3 yes/no
 AIS Spine region ≥3 yes/no
 PRBC:FFP ratio 0-12 hrs. continuous
 APACHE II admission score continuous
 Max. serum Lactate 0-6 hrs. continuous
 Max. Base deficit 0-6 hrs. continuous
 Vasopressor use 0-24 hrs. yes/no
 Body mass index (BMI) continuous
 Comorbidity: COPD yes/no
 Comorbidity: Diabetes yes/no
 Comorbidity: Chronic renal disease yes/no
 Comorbidity: Hypertension yes/no
 Comorbidity: Liver disease yes/no
 Glucose >200 0-24 hrs yes/no

PRBC - packed red blood cells, FFP - fresh frozen plasma, AIS - Abbreviated Injury Score (U) - units, (L) - Liters, Total platelets administered 0-12 hrs and Total cryoprecipitate were analyzed in prior searches but not reported here due to poor performance.