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. 2016 Oct 28;15(1):149.
doi: 10.1186/s12933-016-0466-6.

Metabolic syndrome is independently associated with increased 20-year mortality in patients with stable coronary artery disease

Affiliations

Metabolic syndrome is independently associated with increased 20-year mortality in patients with stable coronary artery disease

Arwa Younis et al. Cardiovasc Diabetol. .

Abstract

Background: Data regarding long-term association of metabolic syndrome (MetS) with adverse outcomes are conflicting. We aim to determine the independent association of MetS (based on its different definitions) with 20 year all-cause mortality among patients with stable coronary artery disease (CAD).

Methods: Our study comprised 15,524 patients who were enrolled in the Bezafibrate Infarction Prevention registry between February 1, 1990, and October 31, 1992, and subsequently followed-up for the long-term mortality through December 31, 2014. MetS was defined according to two definitions: The International Diabetes Federation (IDF); and the National Cholesterol Education Program-Third Adult Treatment Panel (NCEP).

Results: According to the IDF criteria 2122 (14%) patients had MetS, whereas according to the NCEP definition 7446 (48%) patients had MetS. Kaplan-Meier survival analysis showed that all-cause mortality was significantly higher among patients with MetS defined by both the IDF (67 vs. 61%; log rank-p < 0.001) as well as NCEP (67 vs. 54%; log rank-p < 0.001) criteria. Multivariate adjusted mortality risk was 17% greater [Hazard Ratio (HR) 1.17; 95% Confidence Interval (CI) 1.07-1.28] in patients with MetS according to IDF and 21% (HR 1.21; 95% CI 1.13-1.29) using the NCEP definition. Subgroup analysis demonstrated that long-term increased mortality risk associated with MetS was consistent among most clinical subgroups excepted patients with renal failure (p value for interaction < 0.05).

Conclusions: Metabolic syndrome is independently associated with an increased 20-year all-cause mortality risk among patients with stable CAD. This association was consistent when either the IDF or NCEP definitions were used. Trial registration retrospective registered.

Keywords: All-cause mortality; Long term outcomes; Metabolic syndrome; Prognosis; Stable coronary artery disease.

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Figures

Fig. 1
Fig. 1
Kaplan-Meier 20-year survival estimates for the entire cohort. a Survival estimates according to the presence or absence of the metabolic syndrome according to the IDF definition. b Survival estimates according to the presence or absence of metabolic syndrome according to the NCEP definition. Cre creatinine; DM diabetes mellitus; IDF International Diabetes Federation; LDL low density lipoprotein; MetS metabolic syndrome; MI myocardial infarction; NCEP National Cholesterol Educational Program
Fig. 2
Fig. 2
Mortality risk associated with metabolic syndrome presence according to the IDF (a) and NCEP definitions (b) in pre-specified subgroups. Both models further adjusted for: hypertension, smoking status, and severe heart failure (NYHA >2). Cre creatinine; DM diabetes mellitus; IDF International Diabetes Federation; LDL low density lipoprotein; MetS metabolic syndrome; MI myocardial infarction; NCEP National Cholesterol Educational Program

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