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Health Serv Res. 2011 Feb;46(1 Pt 1):185-98. doi: 10.1111/j.1475-6773.2010.01183.x. Epub 2010 Sep 28.

The impact of Medicare Part D on medication treatment of hypertension.

Author information

  • 1Department of Health Policy and Management, University of Pittsburgh, 130 De Soto Street, Crabtree Hall A664, Pittsburgh, PA 15261, USA. ytzhang@pitt.edu

Abstract

OBJECTIVE:

To evaluate Medicare Part D's impact on use of antihypertensive medications among seniors with hypertension.

DATA SOURCES:

Medicare-Advantage plan pharmacy data from January 1, 2004 to December 12, 2007 from three groups who before enrolling in Part D had no or limited drug benefits, and a comparison group with stable employer-based coverage.

STUDY DESIGN:

Pre-post intervention with a comparison group design was used to study likelihood of use, daily counts, and substitutions between angiotensin-converting enzyme inhibitors and angiotensin-II receptor blockers (ARBs).

PRINCIPAL FINDINGS:

Antihypertensive use increased most among those without prior drug coverage: likelihood of use increased (odds ratio = 1.40, 95 percent confidence interval [CI] 1.25-1.56), and daily counts increased 0.29 (95 percent CI 0.24-0.33). Proportion using ARBs increased from 40 to 46 percent.

CONCLUSIONS:

Part D was associated with increased antihypertensive use and use of ARBs over less expensive alternatives.

© Health Research and Educational Trust.

PMID:
20880045
[PubMed - indexed for MEDLINE]
PMCID:
PMC3034269
Free PMC Article
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