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Medical Expenditures Associated With Diabetes in Myocardial Infarction and Ischemic Stroke Patients
Xilin Zhou1, Sundar S Shrestha1, Elizabeth Luman1
1Division of Diabetes Translation, Centers for Disease Control and Prevention, Atlanta, Georgia.
Insights
Diabetes significantly increases medical costs for heart attack and stroke patients. Managing diabetes effectively could reduce these substantial financial burdens.
Area of Science:
- Health Economics
- Cardiovascular Disease
- Endocrinology
Background:
- Diabetes is common in patients with acute myocardial infarction (AMI) and acute ischemic stroke (AIS).
- The financial impact of diabetes on these patient populations is not well understood.
Purpose of the Study:
- To quantify the excess medical expenditures associated with diabetes in patients with AMI and AIS.
Main Methods:
- Analysis of 2008-2014 Medical Expenditure Panel Survey data for 3,307 AMI and 2,460 AIS patients.
- Estimation of per capita annual excess medical expenditures using generalized linear and two-part models.
- Expenditures adjusted to 2014 U.S. dollars.
Main Results:
- Annual excess expenditures were $5,117 for AMI patients and $5,734 for AIS patients.
- Prescription drugs constituted 40-42% of excess costs.
- Higher utilization, not higher unit costs, drove excess spending.
Conclusions:
- Diabetes imposes substantial excess medical costs on AMI and AIS patients.
- Improved diabetes prevention and management are crucial to reduce healthcare spending.
Introduction:
The coexistence of diabetes among people with acute myocardial infarction (AMI) or acute ischemic stroke (AIS) is common. However, little is known about the extent of excess medical expenditures associated with having diabetes among AMI and AIS patients.
Methods:
Data on 3,307 AMI patients and 2,460 AIS patients aged ≥18 years from the 2008 to 2014 Medical Expenditure Panel Survey were analyzed. Per capita annual medical expenditures associated with diabetes were separately estimated by healthcare components with generalized linear models and two-part models. Excess expenditure associated with diabetes is the difference between estimated expenditure conditional on having both diabetes and AMI (or AIS) and the estimated expenditure conditional on having AMI (or AIS) but not diabetes. All expenditures were adjusted to 2014 U.S. dollars. The analysis was conducted in 2017.
Results:
Per capita annual total excess expenditures associated with diabetes were $5,117 (95% CI=$4,989, $5,243) for AMI patients and $5,734 (95% CI=$5,579, $5,887) for AIS patients. Of the total excess expenditures, prescription drugs accounted for 40% among AMI patients and 42% among AIS patients. Higher expenditures associated with diabetes were explained more by higher volume of utilization than higher per unit expenditures.
Conclusions:
Excess expenditures associated with diabetes were substantial among both AMI and AIS patients. These results highlight the needs for both prevention and better management of diabetes among AMI and AIS patients, which in turn may lower the financial burden of treating these conditions.
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