title: [Analysis of in-hospital mortality from coronary artery bypass grafting surgery].
abstract: OBJECTIVE
  Outcomes research and monitoring are of key importance in efforts to improve health care effectiveness and quality. The aim of this study was to describe in-hospital mortality from coronary artery bypass grafting in Spain. Data in an administrative database were used to estimate the statistical performance of two risk-adjustment methods, the Charlson and Ghali indexes.
  
  
  METHODS
  From the Spanish Hospital Minimum Basic Data Set corresponding to 1997 and 1998 all records which included a code for coronary artery bypass grafting were selected. With in-hospital mortality as the outcome variable, two risk-adjusted logistic multiple regression models were constructed.
  
  
  RESULTS
  The database included 13,203 cases, of which 80% were men; mean age was 64.5 years. In-hospital mortality was 7.3%. The figure was significantly higher for women and increased with age. A score of one on the Charlson and Ghali indexes was associated, respectively, with a 23 and 20% increase in the risk of mortality. Probability calculated with the Hosmer-Lemeshow goodness of fit test was 0.765 and 0.965, and the C index was 0.66 and 0.67. Values of Nagelkerke's R2 were 0.051 y 0.058.
  
  
  CONCLUSIONS
  In-hospital mortality from coronary artery bypass grafting is much higher in Spain than in other countries. The Minimum Basic Data Set, a low-cost information system that is easy to access, yields interesting and useful information to measure health care quality.
authors.affiliation: Agencia de Evaluación de Tecnologías Sanitarias. Instituto de Salud Carlos III. Madrid. España. mpalma@isciii.es
authors.forename: Matilde
authors.initials: M
authors.lastname: Palma-Ruiz
authors.forename: Lucía
authors.initials: L
authors.lastname: García De Dueñas
authors.forename: Abel
authors.initials: A
authors.lastname: Rodríguez-González
authors.forename: Antonio
authors.initials: A
authors.lastname: Sarría-Santamera
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001026:Coronary Artery Bypass / Q000401:mortality*; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged