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Open Access Research article

Age-specific prevalence of the metabolic syndrome defined by the International Diabetes Federation and the National Cholesterol Education Program: the Norwegian HUNT 2 study

Bjørn Hildrum12*, Arnstein Mykletun34, Torstein Hole25, Kristian Midthjell6 and Alv A Dahl7

Author Affiliations

1 Department of Psychiatry, Namsos Hospital, Namsos, Norway

2 Norwegian University of Science and Technology, Trondheim, Norway

3 Research Centre for Health Promotion, University of Bergen, Bergen, Norway

4 National Institute of Public Health, Division Epidemiology, Department of Mental Health, Oslo, Norway

5 Section of Cardiology, Department of Internal Medicine, Ålesund Hospital, Ålesund, Norway

6 HUNT Research Centre, Department of Public Health and General Practice, Norwegian University of Science and Technology, Verdal, Norway

7 The Cancer Clinic, Rikshospitalet-Radiumhospitalet Medical Center, University of Oslo, Oslo, Norway

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BMC Public Health 2007, 7:220  doi:10.1186/1471-2458-7-220

Published: 29 August 2007

Abstract

Background

The 2005 International Diabetes Federation (IDF) definition of the metabolic syndrome was designed to be useful worldwide, but to date few prevalence studies have used that definition in European populations. We estimated the age- and sex-stratified prevalence of IDF-defined metabolic syndrome in a county of Norway and compared it with the prevalence estimated using the revised National Cholesterol Education Program-Adult Treatment Panel-III definition (2005 ATP III).

Methods

Cross-sectional analysis of 10,206 participants aged 20–89 years in the Nord-Trøndelag Health Study 1995–97 (HUNT 2).

Results

Prevalence of IDF-defined metabolic syndrome was 29.6% (95% CI: 28.8 to 30.5), compared to 25.9% (95% CI: 25.0 to 26.7) using the 2005 ATP III criteria. The prevalence of IDF-defined metabolic syndrome increased from 11.0% in the 20–29 years age group to 47.2% in the 80–89 years group in men, and from 9.2% to 64.4% for women in the corresponding age groups. Among men and women aged ≥60 years, the IDF criteria classified 56.7% and 75.0%, respectively, as having central obesity, and 89.3% and 90.9%, respectively, as being hypertensive.

Conclusion

According to both definitions, the prevalence of the metabolic syndrome increased strongly with age. The IDF and the American Heart Association/National Heart, Lung, and Blood Institute guidelines for clinical management of metabolic syndrome would classify a high proportion of elderly Norwegians as in need of overall risk assessment for cardiovascular disease.