RESULTS: The mean age of our population was 67 years, and 96% of patients were male. Average APACHE II score was 25.9. Overall hospital mortality and 30-day mortality were 32% and 30%, respectively. When controlling for all other variables, logistic regression analysis revealed that higher Glasgow Coma Scale (GCS), higher serum albumin, and lower serum bilirubin during the first 24 hours of ICU admission were variables most predictive of survival. Using the logistic regression model, we developed a simplified BAG score ([4 x Serum Albumin] + GCS - Total Serum Bilirubin). Higher scores were associated with higher probability of survival. Patients with a BAG score > 15 had a 77% survival rate, while patients with a score ≤ 15 had a 21% survival rate. Furthermore, BAG score had good discriminative value with an AUC of 0.82. Although discrimination was acceptable with the APACHE II score (AUC = 0.81), calibration was poor (SMR 0.63).