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Washington, DC, United States

White H.,Green City | Held C.,Uppsala University Hospital | Stewart R.,Green City | Watson D.,Glaxosmithkline | And 10 more authors.
American Heart Journal | Year: 2010

Background: Elevated plasma levels of lipoprotein-associated phospholipase A2 (Lp-PLA2) are associated with increased risk of cardiovascular (CV) events. Direct inhibition of this proinflammatory enzyme with darapladib may benefit CV patients when given as an adjunct to standard of care, including lipid-lowering and antiplatelet therapies. Methods: STABILITY is a randomized, placebo-controlled, double-blind, international, multicenter, event-driven trial. The study has randomized 15,828 patients with chronic coronary heart disease (CHD) receiving standard of care to darapladib enteric-coated (EC) tablets, 160 mg or placebo. Results: The primary end point is the composite of major adverse cardiovascular events (MACE): CV death, nonfatal myocardial infarction, and nonfatal stroke. The key secondary end points will include major coronary events, total coronary events, individual components of MACE, and all-cause mortality. Prespecified substudies include 24-hour ambulatory blood pressure monitoring, albuminuria progression, changes in cognitive function, and pharmacokinetic and biomarker analyses. Health economic outcomes and characterization of baseline lifestyle risk factors also will be assessed. The study will continue until 1,500 primary end points have occurred to achieve 90% power to detect a 15.5% reduction in the primary end point. The median treatment duration is anticipated to be 2.75 years. Conclusions: STABILITY will assess whether direct inhibition of Lp-PLA 2 with darapladib added to the standard of care confers clinical benefit to patients with CHD. © 2010 Mosby, Inc.

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