title: [Evaluation of clinical predictors of bacteremia in adults hospitalized for community-acquired pneumonia].
abstract: OBJECTIVE
  Identify simple clinical elements that can be used to adequately determine the cases with the highest probability of presenting bacterial isolates in blood cultures.
  
  
  METHODS
  Case-control study with patients hospitalized for community-acquired pneumonia from 1998-2009. Patients with positive blood cultures were defined as cases, and patients with negative blood cultures were defined as controls. The demographic and clinical variables were recorded and a bivariate analysis was conducted. The variables with statistically significant differences between the groups were introduced in a logistic regression model in order to define the independent predictors and generate a clinical prediction model.
  
  
  RESULTS
  A total of 15.2% of the 322 patients studied had positive blood cultures. Ten variables showed significant differences, but only three variables (temperature <38°C, sodium <135 mEq/L and CURB-65 score) were selected for the multivariate analysis. The model developed showed limited capacity to predict the result of the blood cultures (R² = 0.176; Hosmer-Lemeshow: P = 0.338).
  
  
  CONCLUSIONS
  The data obtained in this series did not demonstrate clinical elements with sufficient capacity to predict the result of the blood cultures.
authors.affiliation: Servicio de Clínica Médica, Hospital J. B. Iturraspe, Santa Fe, Argentina. german.diaz.86@hotmail.com
authors.forename: Germán Ignacio
authors.initials: GI
authors.lastname: Díaz Parodi
authors.forename: Héctor Mario
authors.initials: HM
authors.lastname: Musacchio
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001118:Argentina / Q000453:epidemiology; D016470:Bacteremia / Q000097:blood / Q000453:epidemiology*; D016022:Case-Control Studies; D017714:Community-Acquired Infections / Q000097:blood / Q000453:epidemiology*; D015897:Comorbidity; D005260:Female; D005334:Fever / Q000453:epidemiology; D006184:Habits; D006439:Hemodynamics; D006801:Humans; D007297:Inpatients / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D018410:Pneumonia, Bacterial / Q000097:blood / Q000453:epidemiology*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012307:Risk Factors; D055815:Young Adult