title: Weak associations between hospital mortality rates for individual diagnoses: implications for profiling hospital quality.
abstract: OBJECTIVE
  This study examined the consistency of hospital mortality rates across different diagnoses.
  
  
  METHODS
  Standardized mortality ratios for patients discharged in 1991 from US hospitals were determined via the Medicare Hospital Information Report.
  
  
  RESULTS
  Correlations between standardized mortality ratios for different diagnoses were relatively weak, ranging from .03 to .34. Agreement between hospital rankings (based on standardized mortality ratios), as measured by the weighted kappa statistic, was also weak.
  
  
  CONCLUSIONS
  The present results indicate that hospital mortality rates for individual diagnoses are weakly associated. Thus, it may not be valid to generalize conclusions about hospital performance from a single diagnosis.
authors.affiliation: Department of Medicine, Cleveland Veterans Affairs Medical Center, OH 44106, USA.
authors.forename: G E
authors.initials: GE
authors.lastname: Rosenthal
mesh_terms: D001026:Coronary Artery Bypass / Q000401:mortality; D006333:Heart Failure / Q000401:mortality; D006620:Hip Fractures / Q000401:mortality; D017052:Hospital Mortality; D006761:Hospitals / Q000592:standards*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000401:mortality; D009203:Myocardial Infarction / Q000401:mortality; D011014:Pneumonia / Q000401:mortality; D011787:Quality of Health Care / Q000145:classification*; D014481:United States / Q000453:epidemiology