Additional File Supplementary Table S1: Additional information regarding reason for admission, comorbidities and use of organ support during ICU stay of the whole patient sample Reasons for medical admissions, n (%) Sepsis Domiciliary Pneumonia Nosocomial pneumonia Urinary tract Bloodstream Other Cardiovascular Uncompensated heart failure Supraventriclar arrhythmia NSTEMI/Unstable angina STEMI Bradyarrhythmia/syncope Hypertensive emergency Other Respiratory COPD Acute pulmonary edema Pulmonary embolism Asthma Other Neurologic Ischemic stroke Hemorrhagic stroke Seizures Delirium Other Renal Uncompensated chronic kidney Failure Acute kidney injury Pancreatitis Comorbidities, n(%) Hypertension Diabetes With end-organ injury Heart failure NY Class 2 or 3 NY Class 4 Previous myocardial infarction Stroke Dementia Chronic kidney disease 258 (23) 152 (13) 23 (2) 31 (3) 13 (<1) 39 (3) 185 (16) 51 (4) 51 (4) 29 (3) 3 (<1) 23 (2) 6 (<1) 22 (2) 80 (7) 25 (2) 13 (1) 11 (1) 11 (1) 20 (2) 82 (7) 34 (3) 10 (<1) 17 (1) 9 (<1) 12 (1) 28 (2) 19 (1) 9 (<1) 22 (2) 773 (68) 352 (31) 64 (5) 189 (17) 183 (17) 6 (<1) 138 (12) 117 (11) 176 (16) 241 (21) On dialysis Liver failure Child-Pugh C Neoplasic disease Metastatic disease Hematologic disease COPD Need for organ support, n(%) Mechanical ventilation Tracheostomy during ICU stay Duration of MV, days, median [IQ] Non-invasive ventilation Renal replacement therapy Vasopressors 32 (2) 6 (<1) 1 (<1) 235 (21) 51 (4) 34 (3) 26 (2) 192 (17) 19 (1) 2 [1-4] 176 (15) 60 (5) 101 (9) EPCP Score Supplementary Table S2: Univariate analysis for the association between comorbidities and hospital mortality Comorbidity Hypertension Diabetes With end-organ injury Heart failure Previous myocardial infarction Stroke Dementia Chronic kidney disease Liver failure Neoplasic disease Localized disease Metastatic disease Hematologic disease COPD P value 0.411 0.236 0.151 <0.001 0.700 0.281 <0.001 <0.001 0.154 <0.001 0.643 <0.001 <0.001 0.426 Supplementary Table S3: Results of the new simplified model and points attributed to each variable to the EPCP Score: The variables that were initially included on the logistic regression in order to built the model were age, body mass index, PS, admission type, admission due to sepsis, cardiovascular reason for admission, renal reason for admission, previous diagnosis of heart failure, chronic kidney disease, dementia, metastatic tumor, hematological malignancy and a non-full code status. Of the initially included variables, the following variables were retained after stepwise regression and were included on the EPCP Score, PS, admission type, cardiovascular reason for admission, chronic kidney disease, heart failure, metastatic tumor, hematological malignancy, LOS > 1 day and non-full code status. Variable Performance status 0 1 2 Admission type Elective surgery Emergency Surgery Medical Cardiovascular reason for admission Chronic kidney disease Heart failure Metastatic tumor Hematological malignancy LOS > 1 day Non-full code status β coefficient Odds ratio 95% CI P Points for EPCP S Ref 0.59 1.28 Ref 1.81 3.63 Ref 1.16-2.84 2.13-6.17 0.008 <0.001 0 +1 +2 Ref 1.67 1.19 -0.81 Ref 5.31 3.31 0.44 Ref 2.09-13.49 1.91-5.74 0.25-0.77 Ref <0.001 0.004 0 +2.5 +2 -1 0.69 0.48 1.21 1.24 2.00 1.63 3.37 3.48 1.34-3.00 1.04-2.53 1.64-6.88 1.59-7.63 <0.001 0.030 <0.001 0.001 +1 +1 +2 +2 0.60 2.75 1.83 15.69 1.22-2.74 8.45-29.14 0.003 <0.001 +1 +4.5 Supplementary Figure S1: ROC Curve for EPCP. AUC 0.82; 95% CI 0.79-0.85 Supplementary Figure 2: Calibration plot for EPCP Supplementary Table S4: Results for multivariate analysis excluding patients with a non-full code status Variable SAPS 3, per point increase Charlson Commorbidity Index, per point increase Performance status 0 1 2 Odds ratio 1.07 95% CI 1.06-1.09 P <0.001 1.17 1.07-1.28 0.001 Ref 1.63 3.11 Ref 0.99-2.69 1.75-5.53 0.052 <0.001