The cost of acute myocardial infarction in the new millennium: evidence from a multinational registry.
BACKGROUND
Although geographic variation in the treatment of acute myocardial infarction (AMI) has been recognized, the impact of evidence-based international treatment guidelines on such variation is unclear. We sought to characterize resource use and cost of initial hospitalization for AMI in 9 countries and compare the contribution of length of stay (LOS) and procedure use to cost.


METHODS
We applied country-specific cost estimates to data from the international AMI registry associated with the VALIANT trial. The registry includes demographic, medical history, treatment, and discharge information for 5573 patients with AMI admitted to 84 sites in 9 countries from November 1999 to June 2001. Hospitalization cost was estimated by imputed discharge diagnosis-related group code and adjusted for the LOS and procedures. Generalized linear regression was used to adjust cost by country; the contribution of LOS and procedures to cost was assessed by ordinary least squares regression.


RESULTS
Unadjusted mean cost for initial AMI hospitalization was 9993 dollars (95% CI 9702 dollars-10,228 dollars). After adjustment for baseline patient-level variation, the lowest average cost was 1605 dollars (Argentina) and the highest was 9196 dollars (United States). Length of stay explained more of the variation in cost (50.7%) than did procedure intensity (31.9%).


CONCLUSIONS
International differences in the cost of AMI persist, reflecting variations in procedure use and especially LOS. Relative differences in resource costs and incentives inherent in the provision and financing of health care likely contribute to treatment and cost variation and limit the widespread adoption of international practice guidelines.
Kauf
Teresa L
TL
Division of Cardiology, Department of Medicine, Duke University Medical Center, Duke Clinical Research Institute, Durham, NC, USA. teresa.kauf@duke.edu
Velazquez
Eric J
EJ
Crosslin
David R
DR
Weaver
W Douglas
WD
Diaz
Rafael
R
Granger
Christopher B
CB
McMurray
John J V
JJ
Rouleau
Jean-Lucien
JL
Aylward
Philip E
PE
White
Harvey D
HD
Califf
Robert M
RM
Schulman
Kevin A
KA
D000368:Aged; D003365:Costs and Cost Analysis; D005260:Female; D006760:Hospitalization / Q000191:economics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000191:economics* / Q000628:therapy*; D012042:Registries