Which anthropometric measure is the most consistent predictor of diabetes, coronary disease, and mortality?

• A. TG levels
• B. Total weight
• C. Waist circumference
• D. Total cholesterol

Answer: (C)

Abdominal fat distribution drives metabolic risk more than total body weight. Waist circumference directly measures central obesity, which reflects visceral adiposity—the fat around organs that releases fatty acids and inflammatory signals into the portal circulation. This promotes insulin resistance, dyslipidemia, and systemic inflammation, all of which raise the risk of type 2 diabetes, coronary disease, and mortality. Because of this strong link, waist circumference outperforms total weight or BMI in predicting these outcomes, and it adds predictive value even when BMI is normal. Triglycerides and total cholesterol are important risk markers, but they are lab values, not measures of fat distribution, so they don’t capture the central obesity signal the way waist circumference does.