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Am Heart J. 2004 Apr;147(4):677-83.

The Diabetic Postoperative Mortality and Morbidity (DIPOM) trial: rationale and design of a multicenter, randomized, placebo-controlled, clinical trial of metoprolol for patients with diabetes mellitus who are undergoing major noncardiac surgery.

Author information

1
Copenhagen Trial Unit, Center for Clinical Intervention Research, H:S Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark. anne.j@ctu.rh.dk

Abstract

BACKGROUND:

Recent trials suggest that perioperative beta-blockade reduces the risk of cardiac events in patients with a risk of myocardial ischemia who are undergoing noncardiac surgery. Patients with diabetes mellitus are at a high-risk for postoperative cardiac morbidity and mortality. They may, therefore, benefit from perioperative beta-blockade.

METHODS:

The Diabetic Postoperative Mortality and Morbidity (DIPOM) trial is an investigator-initiated and -controlled, centrally randomized, double-blind, placebo-controlled, multicenter trial. We compared the effect of metoprolol with placebo on mortality and cardiovascular morbidity rates in patients with diabetes mellitus who were beta-blocker naive, >or=40 years old, and undergoing noncardiac surgery. The study drug was given during hospitalization for a maximum of 7 days beginning the evening before surgery. The primary outcome measure is the composite of all-cause mortality, acute myocardial infarction, unstable angina, or congestive heart failure leading to hospitalization or discovered or aggravated during hospitalization. Follow-up involves re-examination of patients at 6 months and collection of mortality and morbidity data via linkage to public databases. The study was powered on the basis of an estimated 30% 1-year event rate in the placebo arm and a 33% relative risk reduction in the metoprolol arm. The median follow-up period was 18 months.

RESULTS:

Enrollment started in July 2000 and ended in June 2002. A total of 921 patients were randomized, and 54% of these patients had known cardiac disease, hypertension, or both.

CONCLUSION:

The results of this study may have implications for reduction of perioperative and postoperative risk in patients with diabetes mellitus who are undergoing major noncardiac surgery.

PMID:
15077084
DOI:
10.1016/j.ahj.2003.10.030
[Indexed for MEDLINE]

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