Abstract 3774: Cost Effectiveness Of Enoxaparin In Patients With ST-elevation Myocardial Infarction: Results From EXTRACT-TIMI 25
Background: The efficacy of enoxaparin versus unfractionated heparin in the setting of ST-elevation myocardial infarction (STEMI) has been demonstrated in EXTRACT-TIMI 25, with 17% reductions in relative risk in the primary endpoint of death or nonfatal recurrent myocardial infarction (MI) (p<0.0001). This study considers the cost effectiveness of enoxaparin versus unfractionated heparin with fibrinolysis based on EXTRACT-TIMI 25.
Methods: The ITT population of 20,479 patients from 48 countries were monitored for clinical and adverse events during the index hospitalization and through 30 days. Trial-wide resource utilization from all participating countries was used in the analysis while all costs were based on 2004 US costs. Medicare Fee Schedule was used for outpatient procedures and DRGs were applied for index and subsequent hospitalizations costs. Lost life years associated with 30-day in-trial events (death, MI and stroke) were estimated from published data from Framingham.
Results: Overall, costs of index hospitalizations and outpatient procedures were lower, while costs for the subsequent hospitalization were higher for the enoxaparin patients. Total 30 days’ costs remained lower for enoxaparin, although the difference did not reach significance. Life years lost were significantly less with enoxaparin. For lifetime, when costs beyond the trial period were considered, the costs of enoxaparin in patients with STEMI were $506 higher, and the incremental cost-effectiveness ratio of enoxaparin compared to UFH was $4,369 per life year gained, with 99.9% of estimates falling below the $50,000 per life year gained threshold.
Conclusions: Enoxaparin is effective in reducing mortality or nonfatal MI, and is highly cost-effective strategy in the US settings for the treatment of STEMI patients.