title: Cost of medical injury in New Zealand: a retrospective cohort study.
abstract: OBJECTIVE
  To estimate the cost of treating medical injury associated with hospital admissions in New Zealand and the patient characteristics of costly adverse events.
  
  
  METHODS
  As part of the New Zealand Quality in Healthcare Study (NZQHS), a retrospective examination of medical records in 13 public hospitals identified the occurrence of clinical procedures and hospital bed days attributable to adverse events. The prices charged to foreign patients were used to estimate the cost of the health care resources used.
  
  
  RESULTS
  850 adverse events were identified in the NZQHS which cost an average of $NZ 10,264 per patient. For New Zealand, adverse events are estimated to cost the medical system $NZ 870 million, of which $NZ 590 million went toward treating preventable adverse events. The results suggest that up to 30% of public hospital expenditure goes toward treating an adverse event. The results also suggest that older patients, neonates and those with moderately serious co-morbidity tended to have more costly adverse events.
  
  
  CONCLUSIONS
  Adverse events lead to a significant use of health care resources in New Zealand. These findings suggest that substantial resources could be saved by eliminating preventable adverse events.
authors.affiliation: Department of Community Health, University of Auckland, New Zealand.
authors.forename: Paul
authors.initials: P
authors.lastname: Brown
authors.forename: Colin
authors.initials: C
authors.lastname: McArthur
authors.forename: Lynette
authors.initials: L
authors.lastname: Newby
authors.forename: Roy
authors.initials: R
authors.lastname: Lay-Yee
authors.forename: Peter
authors.initials: P
authors.lastname: Davis
authors.forename: Robin
authors.initials: R
authors.lastname: Briant
mesh_terms: D003365:Costs and Cost Analysis; D003951:Diagnostic Errors / Q000191:economics* / Q000706:statistics & numerical data; D006302:Health Services Research; D017721:Hospital Costs / Q000706:statistics & numerical data; D006779:Hospitals, Public; D006801:Humans; D007049:Iatrogenic Disease; D016018:Least-Squares Analysis; D019300:Medical Errors / Q000191:economics* / Q000706:statistics & numerical data; D009520:New Zealand; D012189:Retrospective Studies; D014947:Wounds and Injuries / Q000191:economics