Central obesity and multivariable cardiovascular risk as assessed by the Framingham prediction scores

Area of Science:

• Cardiology
• Public Health
• Epidemiology

Background:

• Cardiovascular disease (CVD) remains a leading cause of mortality globally.
• The Framingham risk score is a widely used tool for predicting CVD risk.
• Central obesity is increasingly recognized as a significant health concern.

Purpose of the Study:

• To assess the predictive value of central obesity measurements for cardiovascular risk.
• To determine if waist circumference (WC) and waist-to-hip ratio (WHR) improve CVD risk prediction beyond the Framingham risk score.
• To investigate the independent contribution of central obesity to cardiovascular mortality.

Main Methods:

• A cohort study of 4,175 Australian men, free of cardiovascular disease and diabetes at baseline (1989).
• Follow-up for mortality until 2004, recording baseline lipids, blood pressure, smoking, body mass index, WC, and WHR.
• Cox proportional hazards regression analysis was used to evaluate predictors of coronary heart disease (CHD) and CVD deaths.

Main Results:

• The Framingham equations effectively predicted CHD and CVD deaths.
• Waist circumference (WC) and waist-to-hip ratio (WHR) independently predicted cardiovascular deaths, unlike body mass index.
• WHR and WC added significant predictive value for cardiovascular outcomes, particularly in individuals with lower Framingham risk scores.

Conclusions:

• Central obesity, measured by WC and WHR, is a significant and independent predictor of cardiovascular mortality.
• These central obesity metrics contribute to residual cardiovascular risk not captured by the Framingham equations.
• Incorporating central obesity measures may refine cardiovascular risk assessment, especially for individuals at lower traditional risk levels.