Brazil / Humans / Female / Male / ROC Curve / C reactive protein / Biological markers / Calcitonin / Peptide hormones / Multiple Organ Failure / Area Under Curve / Predictive value of tests / Cohort Studies / Atrial Natriuretic Factor / C reactive protein / Biological markers / Calcitonin / Peptide hormones / Multiple Organ Failure / Area Under Curve / Predictive value of tests / Cohort Studies / Atrial Natriuretic Factor