Fig. 2. Correlation matrix of serum endocannabinoid concentrations at both time points; and selected demographic and clinical characteristics.

2-AG = 2-arachidonoylglycerol; AEA = N-arachidonoylethanolamine; H = hospitalization; 6 mo = 6–8 months follow-up visit; GCS = Glasgow Coma Scale; ISS = injury severity score; BP = blood pressure; LOS = length of stay in the hospital. Time to blood draw refers to the number of days from trauma to blood draw in hospital (H) and follow-up (6 mo); time from last meal is hours from last time eating to a blood draw in the hospital (H) and at follow-up (6 mo). Previous trauma (H) is trauma history prior to injury; and Previous trauma (6 mo) is trauma history between injury to follow-up assessment.