Variations in prevalent cardiovascular disease and future risk by metabolic syndrome classification in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study
- PMID: 20211299
- PMCID: PMC2841510
- DOI: 10.1016/j.ahj.2009.12.022
Variations in prevalent cardiovascular disease and future risk by metabolic syndrome classification in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study
Abstract
Background: The International Diabetes Federation (IDF) and Adult Treatment Panel (ATP) III define metabolic syndrome (MetSyn) differently, with unclear implications for cardiovascular disease (CVD) risk.
Methods: We examined 22,719 participants in the REGARDS study. We classified participants as: no MetSyn, MetSyn by ATP-III and IDF criteria, MetSyn by ATP-only, or MetSyn by IDF-only. To assess current CVD, we determined the odds of self-reported CVD by MetSyn category using multivariable logistic regression, controlling for socio-demographic and behavioral factors. To estimate future coronary heart disease risk, we calculated Framingham risk scores (FRS).
Results: Overall, 10,785 individuals (47%) had MetSyn. Of these, 79% had MetSyn by both definitions, 6% by ATP-only, and 14% by IDF-only. Compared to those without MetSyn, ATP-only individuals had the highest odds of current CVD and of having a FRS >20%. Also compared to those without MetSyn, IDF-only individuals had 43% higher odds of current CVD and 2-fold increased odds of having a FRS >20%.
Conclusions: Consistent with previous reports, ATP-III MetSyn criteria identified individuals with increased odds of CVD and elevated future coronary heart disease risk. However, the IDF definition identified a clinically important number of additional individuals at excess CVD risk.
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