Derivation and validation of a prognostic model for postoperative risk stratification of critically ill patients with faecal peritonitis.

Background Prognostic scores and models of illness severity are useful both clinically and for research. The aim of this study was to develop two prognostic models for the prediction of long-term (6 months) and 28-day mortality of postoperative critically ill patients with faecal peritonitis (FP).