Conclusions P-POSSUM was the most accurate model for predicting post-operative mortality after colorectal cancer surgery .
The original POSSUM model was accurate in predicting post-operative complications
Introduction The Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity  ( POSSUM ) model and its Portsmouth ( P-POSSUM ) and colorectal ( CR-POSSUM ) modifications are used extensively to predict and audit post-operative mortality and morbidity .
This aim of this systematic review was to assess the predictive value of the POSSUM models in colorectal cancer surgery .
Comparison of POSSUM with APACHE II for prediction of outcome from a surgical high‐dependency unit
POSSUM and APACHE II scores from 117 consecutive admissions to a high‐dependency unit after major surgery were correlated with 30‐day morbidity and mortality rates . Thirteen patients ( II per cent ) died and 59 ( 50 per cent ) developed a postoperative complication . Receiveroperating characteristic curve analysis showed POSSUM to have good predictive value for mortality ( area under curve 0.75 ) and morbidity ( area under curve 0.82 ) . APACHE II scores had a significantly inferior predictive value for mortality ( area under curve 0.54 ) ( P < 0.002 ) .  POSSUM  was superior to APACHE II in prediction of mortality in patients admitted to a high‐dependency unit after general surgery . Prediction of postoperative complications by POSSUM is accurate and may be useful for audit
Conclusions P-POSSUM was the most accurate model for predicting post-operative mortality after colorectal cancer surgery .
The original POSSUM model was accurate in predicting post-operative complications
Introduction The Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity  ( POSSUM ) model and its Portsmouth ( P-POSSUM ) and colorectal ( CR-POSSUM ) modifications are used extensively to predict and audit post-operative mortality and morbidity .
This aim of this systematic review was to assess the predictive value of the POSSUM models in colorectal cancer surgery .