What is waist circumference measurement useful for in obesity risk assessment?

• A. It reflects overall body mass alone.
• B. It assesses central adiposity, which is linked to higher cardiometabolic risk beyond BMI alone.
• C. It replaces BMI as the sole measure.
• D. It predicts future height.

Answer: (B)

Waist circumference measures how much fat is stored around the midsection, capturing central adiposity. This pattern of fat distribution is more strongly linked to cardiometabolic problems—like insulin resistance, high blood pressure, and abnormal lipids—than BMI alone. So, measuring waist size helps identify increased risk that BMI might miss, especially when overall weight is similar but fat is concentrated around the abdomen. It complements BMI and is not a replacement, since it doesn’t reflect total body mass and it doesn’t predict height. In practice, a larger waist for age and sex signals higher cardiometabolic risk and can guide earlier lifestyle or intervention efforts.