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OBJECTIVE: This study was designed to assess the role of the ASA, POSSUM and APACHE II score systems for predicting
the complications in patients undergoing surgery for colorectal diseases.
METHODS: We retrospectively analyzed 539 patients undergoing colorectal surgery between January 1996 and December
2006. The accuracy of ASA, POSSUM and APACHE II score systems for predicting perioperative complications has been
RESULTS: Total postoperative morbidity was 15%, overall perioperative mortality was 1.5%. APACHE II and POSSUM
predicted with the same accuracy the perioperative complications (0.65 and 0.68, respectively), while ASA score system
revealed a poorer predicting accuracy (0.56). POSSUM predicted death rate more accurately compared to the APACHE
II classification (1.6% vs. 10.4%).
CONCLUSIONS: APACHE II and POSSUM score systems may be useful tools helping surgeons to identify patient groups
at high risk for complications. The ASA classification resulted less accurate, probably because related to the anesthesiologist’s