Waist-to-Height Ratio May Predict Hypertension Risk More Accurately Than BMI: Study Finds

What if your waistline-not your weight-holds the real clue to your blood pressure risk?

A growing body of research is challenging the long-standing reliance on body mass index (BMI) as the primary measure of obesity. A new study from the University of Eastern Finland and Rutgers University suggests that the waist-to-height ratio may be a far more accurate predictor of hypertension risk—offering a simple yet powerful tool for early detection.

The findings are published in The Journal of Nutrition.

Unlike BMI, which only considers weight relative to height, waist-to-height ratio focuses on fat distribution—particularly around the abdomen. This distinction matters because central fat is more strongly linked to cardiometabolic diseases. BMI often fails to differentiate between fat and muscle, meaning a muscular individual could be misclassified as overweight, while someone with excess abdominal fat might go unnoticed.

Analyzing data from over 19,000 participants in the US National Health and Nutrition Examination Survey (2015–2023), researchers found that individuals with high fat mass based on waist-to-height ratio were 50% more likely to have elevated blood pressure and 82% more likely to develop hypertension. Those with excess fat faced even higher risks—91% for elevated blood pressure and a striking 161% for hypertension.

The predictive power of waist-to-height ratio was especially strong among adults aged 25 to 65. Even in younger populations, higher waist-to-height ratio was linked to a significantly increased likelihood of elevated blood pressure, though hypertension itself remained less common in this group.

In contrast, while BMI showed some association with early-stage blood pressure elevation, it failed to reliably predict hypertension. Researchers believe this is due to BMI’s inability to isolate fat mass from lean muscle, which can distort risk assessments.

With a simple guideline—keeping your waist circumference less than half your height—this measure could be easily adopted in both clinical and everyday settings.

REFERENCE: Ali, M. W., et al. (2026). Novel Waist-to-Height Ratio Estimated Fat Mass Pediatric Cut-offs Predict Hypertension Better than Body Mass Index in Multiracial United States Youths and Adults: The National Health and Nutrition Examination Survey 2015-2023 Cycle. The Journal of Nutrition. DOI: 10.1016/j.tjnut.2026.101426.