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Int J Clin Pract. 2013 Apr;67(4):297-302. doi: 10.1111/ijcp.12089.

Effects of niacin on the incidence of new onset diabetes and cardiovascular events in patients with normoglycaemia and impaired fasting glucose.

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  • 1Merck Sharp & Dohme Corp., Whitehouse Station, NJ 07065-0900, USA.

Erratum in

  • Int J Clin Pract. 2013 Dec;67(12):1361.

Abstract

BACKGROUND:

This post hoc analysis from the Coronary Drug Project (CDP) evaluated the effects of niacin vs. placebo on the incidence of new onset type 2 diabetes mellitus (T2DM) and cardiovascular event rates in patients with normal and impaired fasting glucose (IFG).

METHODS:

The CDP was a randomised, placebo-controlled clinical trial of lipid-modifying agents in men with previous myocardial infarction. Normoglycaemia and IFG were defined as fasting plasma glucose (FPG) < 5.6 mmol/l and FPG ≥ 5.6 but < 7.0 mmol/l, respectively. New onset T2DM was defined by ≥ 1 of the following: clinical diagnosis of T2DM, use of an antihyperglycaemic therapy, or two FPG values ≥ 7.0 mmol/l.

RESULTS:

The incidence of new onset T2DM was higher in patients with IFG (16.5%) compared with those with normoglycaemia (5.4%), and was slightly higher with niacin vs. placebo in both normoglycaemic (6.8% vs. 4.9%; p = 0.07) and IFG (19.8% vs. 15.2%; p = 0.05) patients. Consistent with previous analyses, the cardiovascular benefit of niacin was independent of baseline glycaemic status (normal, IFG, T2DM) and change in fasting glucose level from baseline to year 1.

CONCLUSION:

Despite a modest increase in risk of new onset T2DM with long-term niacin therapy, there is a potential cardiovascular benefit of niacin.

© 2013 Blackwell Publishing Ltd.

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