title: Comparison of Maryland hospital discharge and trauma registry data.
abstract: BACKGROUND
  This study aimed to examine the validity of using Maryland hospital discharge data to characterize injuries sustained by trauma patients.
  
  
  METHODS
  Maryland hospital discharge and Maryland trauma registry data for 1999 were merged, and the extent of agreement regarding the presence and severity of injuries sustained was evaluated.
  
  
  RESULTS
  The mean Injury Severity Score was 8.4 according to the Maryland hospital discharge data and 10 according to the Maryland trauma registry data (p < 0.0001). The Maryland hospital discharge data identified 95% or more of all moderate to severe injuries (Abbreviated Injury Score, > or =2) for all body regions except the head. There was substantial agreement between the two data sets for mechanism of injury (weighted kappa, 0.62), the number of preexisting conditions present (weighted kappa, 0.45) and final disposition (weighted kappa, 0.78).
  
  
  CONCLUSIONS
  The Maryland hospital discharge data are a valid source for documenting the nature and severity of injuries sustained by trauma patients, except for those with a relatively minor head injury.
authors.affiliation: Johns Hopkins School of Medicine, Baltimore, Maryland 21205, USA. mmccarth@jhmi.edu
authors.forename: Melissa Lee
authors.initials: ML
authors.lastname: McCarthy
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Shore
authors.forename: Tracey
authors.initials: T
authors.lastname: Serpi
authors.forename: Melanie
authors.initials: M
authors.lastname: Gertner
authors.forename: Lori
authors.initials: L
authors.lastname: Demeter
mesh_terms: D015998:Abbreviated Injury Scale; D000293:Adolescent; D000328:Adult; D000368:Aged; D000465:Algorithms; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D015601:Injury Severity Score; D008297:Male; D008396:Maryland / Q000453:epidemiology; D008875:Middle Aged; D010351:Patient Discharge / Q000706:statistics & numerical data*; D012042:Registries; D014193:Trauma Centers / Q000706:statistics & numerical data*; D014947:Wounds and Injuries / Q000453:epidemiology*