title: German CABG score: a specific risk model for patients undergoing isolated coronary artery bypass grafting.
abstract: BACKGROUND
  A specific risk model concerning mortality of patients undergoing isolated coronary artery bypass grafting (CABG) is developed based on the national quality benchmarking mandatory by law in Germany.
  
  
  METHODS
  On the basis of the national data pool from 2004, a risk score model for patients undergoing isolated CABG was developed and finally adjusted with the data of 43,145 patients of the year 2008. Modeling was performed by logistic regression analysis. This risk model was validated with the 2007 data pool which comprised 45,569 patients.
  
  
  RESULTS
  Observed in-hospital mortality after isolated CABG procedures was 3.0% in 2008. Hosmer-Lemeshow test p value was 0.189 and area under receiver operating characteristic curve was 0.826. Applying the German CABG score for 2007 resulted in an observed-to-expected mortality ratio of 1.01.
  
  
  CONCLUSIONS
  The German CABG score for in-hospital mortality is a risk score with proven validity for isolated CABG, developed by means of the patient population in Germany. It can be used for the assessment of patient risk groups and for interhospital benchmarking. We encourage other researchers to apply and validate this score in comparable health care systems.
authors.affiliation: BQS Institute for Quality and Patient Safety, Düsseldorf, North Rhine-Westphalia, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Kötting
authors.affiliation: Department of Cardiac and Vascular Surgery, Heart Center Duisburg, Duisburg, North Rhine-Westphalia, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Beckmann
authors.affiliation: Competence Center for Quality Management, MDK Baden-Württemberg, Stuttgart, Baden-Württemberg, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Döbler
authors.affiliation: BQS Institute for Quality and Patient Safety, Düsseldorf, North Rhine-Westphalia, Germany.
authors.forename: Elke
authors.initials: E
authors.lastname: Schäfer
authors.affiliation: BQS Institute for Quality and Patient Safety, Düsseldorf, North Rhine-Westphalia, Germany.
authors.forename: Christof
authors.initials: C
authors.lastname: Veit
authors.affiliation: Department of Cardiac Surgery, University of Bonn, Bonn, North Rhine-Westphalia, Germany.
authors.forename: Armin
authors.initials: A
authors.lastname: Welz
authors.affiliation: Department of Cardiac Surgery, University of Bonn, Bonn, North Rhine-Westphalia, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schiller
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019985:Benchmarking; D001026:Coronary Artery Bypass / Q000009:adverse effects / Q000401:mortality* / Q000592:standards; D003661:Decision Support Techniques; D005260:Female; D005858:Germany; D006331:Heart Diseases / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D017052:Hospital Mortality; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D018579:Patient Selection; D011237:Predictive Value of Tests; D019984:Quality Indicators, Health Care; D015203:Reproducibility of Results; D018570:Risk Assessment; D012307:Risk Factors; D016896:Treatment Outcome; D055815:Young Adult