Editorial |

Does PERISCOPE Provide a New Perspective on Diabetic Treatment?

Philippe Gabriel Steg, MD; Michel Marre, MD
JAMA. 2008;299(13):1603-1604. doi:10.1001/jama.299.13.1603.
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Cardiovascular events, particularly acute myocardial infarction and stroke, are the main causes of death in patients with diabetes. Whether stringent glucose control and use of specific glucose-lowering drugs reduce this risk has remained a controversial issue for decades.1,2 Thus, adequately powered randomized clinical trials are now required to study the effect of new antidiabetic drugs on cardiovascular death, myocardial infarction, and stroke. One of these studies was the Proactive (Prospective Pioglitazone Clinical Trial in Macrovascular Events) trial, which compared pioglitazone with placebo in addition to standard glucose-lowering drugs in more than 5000 patients.3 In the Proactive trial, treatment with pioglitazone failed to reduce significantly the primary composite end point of death, myocardial infarction, stroke, revascularization, and amputation, even though the secondary end point of death, myocardial infarction, and stroke was reduced (hazard ratio [HR]; 0.84, 95% confidence interval [CI], 0.72-0.98; P = .027). A patient-level meta-analysis of the 19 randomized, double-blind controlled trials of pioglitazone showed consistent results for reducing cardiovascular events, with an HR of 0.82 (95% CI, 0.72-0.94; P = .005) but at the price of an excess of serious heart failure (HR, 1.41; 95% CI, 1.14-1.76; P = .002).4

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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