Authors:
Bruce Stuart, Ph.D., Amy Davidoff, Ph.D., Ruth Lopert, B.Sc.,
B.Med., M.Med.Sci., Thomas Shaffer, M.H.S., J. Samantha Shoemaker, and
Jennifer Lloyd, M.A.
Journal:
Health Services Research, published online March 17, 2010
Contact:
Jennifer Lloyd, University of Maryland School of Medicine,
jlloyd@epi.umaryland.edu
Summary Writers:
Deborah Lorber
The Issue
Research has shown that certain prescription
medications—specifically, statins and rennin-angiotensin-aldosterone
system (RAAS) inhibitors—can help elderly diabetic patients by
preventing or delaying certain complications. In addition to improving
clinical outcomes, better adherence to these medications can also reduce
medical costs.
What the Study Found
With support from The Commonwealth Fund, researchers used data
from the Medicare Current Beneficiary Survey to look at medication
adherence rates and Medicare expenses over three years for beneficiaries
who filled prescriptions for RAAS inhibitors and statins. For patients
using RAAS inhibitors, a 10-percentage-point increase in medication
possession ratio (MPR)—a measure of medication adherence—was associated
with a spending reduction of $285. A 10-percentage-point increase in MPR
for statin users was associated with a spending reduction of $832. To
put these numbers in context, the researchers estimate that the cost of
the drugs, for the same period, would be $110.45 for RAAS inhibitors and
$291.44 for statins.
Conclusions
"At the margin, utilization of both drugs was associated with net savings to the Medicare program," the authors conclude.
Citation
B. Stuart, A. Davidoff, R. Lopert et al., "Does
Medication Adherence Lower Medicare Spending Among Beneficiaries with
Diabetes?" Health Services Research, published online March 17, 2011.
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