title: Association of hospitalist presence and hospital-level outcome measures among Medicare patients.
abstract: BACKGROUND
  Hospitalists have been shown to lower patient costs through better resource utilization and decreased length of stay, but it is unclear whether hospitalists are associated with quality of care. We examined the association between the presence of hospitalists and 30-day predicted excess all-cause hospital mortality and readmissions among Medicare patients admitted to a hospital with any of 3 conditions: heart failure, acute myocardial infarction, and pneumonia.
  
  
  METHODS
  Using national hospital-level, case mix-adjusted, risk-standardized, 30-day all-cause excess mortality and readmission data from the Centers for Medicare and Medicaid Services, we used descriptive and bivariate statistics to illustrate trends across hospitals. Using multivariable ordinary least squares regression to control for hospital-level characteristics, we then estimated the association between the presence of hospitalists and predicted hospital mortality and readmission.
  
  
  RESULTS
  After multivariable adjustment, the presence of hospitalists was associated with lower probability of readmission for all 3 target conditions. No significant associations for any of the target conditions were found in all-cause mortality models.
  
  
  CONCLUSIONS
  Hospitalists are already integral to the delivery of inpatient care at most institutions. This study, however, showed an association at the national level of the presence of hospitalists with an important and timely quality measure: reduction of readmission rates. Future research is indicated to explore specific causation pathways for the impact of hospitalists on quality of care.
authors.affiliation: Albert Einstein College of Medicine, Bronx, New York; Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
authors.forename: Robert
authors.initials: R
authors.lastname: Jungerwirth
authors.forename: Stephanie B
authors.initials: SB
authors.lastname: Wheeler
authors.forename: John E
authors.initials: JE
authors.lastname: Paul
mesh_terms: D017052:Hospital Mortality / Q000639:trends; D020445:Hospitalists / Q000191:economics / Q000592:standards* / Q000639:trends; D006761:Hospitals / Q000592:standards*; D006801:Humans; D006278:Medicare / Q000191:economics / Q000592:standards* / Q000639:trends; D017063:Outcome Assessment, Health Care / Q000191:economics / Q000592:standards* / Q000639:trends; D011787:Quality of Health Care / Q000191:economics / Q000592:standards / Q000639:trends; D014481:United States / Q000453:epidemiology