title: Very low-dose warfarin prophylaxis to prevent thromboembolism in women with metastatic breast cancer receiving chemotherapy: an economic evaluation.
abstract: OBJECTIVE
  A recent double-blind, randomized trial demonstrated that very low-dose warfarin (VLDW) reduced the incidence of venous thromboembolism (VTE) without increasing the rate of bleeding in women with metastatic breast cancer receiving chemotherapy. We have evaluated the economic impact on the health care system of using VLDW in such patients.
  
  
  METHODS
  The records of patients entered onto the trial and a simultaneous, fully allocated, costing model for a tertiary care hospital in Hamilton, Canada were used to determine the difference in costs associated with the care of patients with and without VLDW.
  
  
  RESULTS
  The cost of providing VLDW was $ 21,854 (Canadian dollars) per 100 patients. This therapy led to a reduction in costs of $ 24,297 per 100 patients, thus saving the health care system $ 2,443 per 100 patients. In the sensitivity analysis, VLDW prophylaxis still did not increase health care costs unless the cost of VLDW was greatly increased, the cost of treating thromboembolic episodes was markedly reduced, or the incidence of either VTE or bleeding with VLDW was increased above the rates observed in the trial.
  
  
  CONCLUSIONS
  We conclude that for women receiving chemotherapy for metastatic breast cancer, the benefits of VLDW can be realized without increased health care costs.
authors.affiliation: Department of Clinical Epidemiology, McMaster University, Hamilton, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Rajan
authors.forename: A
authors.initials: A
authors.lastname: Gafni
authors.forename: M
authors.initials: M
authors.lastname: Levine
authors.forename: J
authors.initials: J
authors.lastname: Hirsh
authors.forename: M
authors.initials: M
authors.lastname: Gent
mesh_terms: D001943:Breast Neoplasms / Q000150:complications / Q000188:drug therapy*; D002170:Canada; D005260:Female; D017048:Health Care Costs; D006801:Humans; D013923:Thromboembolism / Q000517:prevention & control*; D014859:Warfarin / Q000008:administration & dosage / Q000191:economics*
chemical_list: D014859:Warfarin