title: Comparison between Sequential Organ Failure Assessment score (SOFA) and Cardiac Surgery Score (CASUS) for mortality prediction after cardiac surgery.
abstract: BACKGROUND
  Our purpose was to evaluate and compare the accuracy of the "Sequential Organ Failure Assessment" score (SOFA) and the "Cardiac Surgery Score" (CASUS) for the prediction of mortality after cardiac surgery.
  
  
  METHODS
  Between January 1, 2007 and December 31, 2008 we prospectively included all consecutive adult patients admitted to our intensive care unit (ICU) after cardiac surgery. Both scoring systems were calculated daily from the 1st day in the ICU (day of operation) until the 7th ICU day. We evaluated the ICU mortality prediction of both models using calibration and discrimination statistics.
  
  
  RESULTS
  2801 patients (29.6% females) were included. Mean age was 66.9 ± 10.7 years. Intensive care unit mortality was 5.2%. The calibration of the "Sequential Organ Failure Assessment Score" and "Cardiac Surgery Score" was reliable for all days (p ≥ 0.05). CASUS was more accurate in predicting survival and mortality compared to SOFA for all days, as evidenced by the larger areas under the Receiver Operating Characteristic curves.
  
  
  CONCLUSIONS
  Both CASUS and SOFA are reliable mortality prediction tools after cardiac surgery. However, CASUS was more accurate in predicting the individual patient's risk of mortality. Thus, use of the CASUS in cardiac surgery intensive care units is recommended.
authors.affiliation: Department of Cardiothoracic Surgery, Friedrich Schiller University of Jena, Jena, Germany. akmalbadreldin@yahoo.com
authors.forename: A M A
authors.initials: AM
authors.lastname: Badreldin
authors.forename: F
authors.initials: F
authors.lastname: Doerr
authors.forename: M M
authors.initials: MM
authors.lastname: Ismail
authors.forename: M B
authors.initials: MB
authors.lastname: Heldwein
authors.forename: T
authors.initials: T
authors.lastname: Lehmann
authors.forename: O
authors.initials: O
authors.lastname: Bayer
authors.forename: T
authors.initials: T
authors.lastname: Doenst
authors.forename: K
authors.initials: K
authors.lastname: Hekmat
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D006348:Cardiac Surgical Procedures / Q000009:adverse effects / Q000401:mortality*; D016009:Chi-Square Distribution; D016002:Discriminant Analysis; D005260:Female; D005858:Germany; D006305:Health Status Indicators; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D009102:Multiple Organ Failure / Q000209:etiology / Q000401:mortality*; D011446:Prospective Studies; D012372:ROC Curve; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult