title: A history of diabetes is associated with an adverse outcome among patients admitted to hospital alive after an out-of-hospital cardiac arrest.
abstract: BACKGROUND
  Factors of importance for the outcome among patients who are admitted to hospital alive after an out-of-hospital cardiac arrest are not well described in the literature. The importance of a history of diabetes for the outcome among these patients has not been reported in detail previously. This survey aims to describe the outcome among patients who were admitted to hospital after an out-of-hospital cardiac arrest in relation to whether they had a history of diabetes.
  
  
  METHODS
  All patients who were admitted to hospital alive after an out-of-hospital cardiac arrest in the two city hospitals in the Municipality of Göteborg between 1980 and 2002 were included in the survey.
  
  
  RESULTS
  In all, 1377 patients fulfilled the inclusion criteria and 187 (14%) of them had a history of diabetes. Patients with diabetes differed from those without diabetes by having a previous history of myocardial infarction, angina pectoris, hypertension and heart failure more frequently. Furthermore, they were older, with a mean age of 70 years versus 66 years for patients without diabetes. Among patients with diabetes, 25% were discharged alive, as compared with 37% of patients without diabetes (p=0.002). When adjusting for differences at baseline, the adjusted odds ratio for diabetic patients being discharged alive (versus no diabetes) was 0.57 (95% confidence interval, 0.39-0.80).
  
  
  CONCLUSIONS
  Among patients admitted to hospital after an out-of-hospital cardiac arrest, 14% had a history of diabetes. These patients had a lower survival rate compared with those without diabetes, even after correcting for dissimilarities at baseline. It remains to be determined whether an early metabolic intervention in these patients will improve survival.
authors.affiliation: Division of Cardiology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Larsson
authors.forename: Ann-Britt
authors.initials: AB
authors.lastname: Thorén
authors.forename: Johan
authors.initials: J
authors.lastname: Herlitz
mesh_terms: D017677:Age Distribution; D000368:Aged; D000787:Angina Pectoris / Q000453:epidemiology; D015897:Comorbidity; D003920:Diabetes Mellitus / Q000401:mortality*; D004632:Emergency Medical Services / Q000706:statistics & numerical data*; D005260:Female; D006323:Heart Arrest / Q000401:mortality* / Q000628:therapy*; D006333:Heart Failure / Q000453:epidemiology; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D015999:Multivariate Analysis; D009203:Myocardial Infarction / Q000453:epidemiology; D016017:Odds Ratio; D010043:Outcome and Process Assessment, Health Care; D016019:Survival Analysis; D013548:Sweden / Q000453:epidemiology