Body Roundness Index May Indicate Higher Cancer Risks

A large study suggests this measurement could help postmenopausal women better understand their long-term cancer risk.

Updated on Oct. 23, 2026 in Cancer

Body Roundness Index May Indicate Higher Cancer Risks

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Do you trust body shape measurements over BMI to better assess your long-term health risks?

A large-scale study of 144,865 postmenopausal women released on October 23, 2026, links higher body roundness index to an increased risk of several cancer types. Researchers followed participants for a median of 17.9 years to identify associations between abdominal fat distribution and cancer incidence.

Why it matters

Body roundness index may offer a more precise way to measure abdominal adiposity than traditional body mass index, providing clinicians with potentially better tools for cancer risk assessment. This shift toward evaluating fat distribution could refine how healthcare providers evaluate long-term wellness in postmenopausal patients.

This longitudinal cohort study followed 144,865 postmenopausal women aged 50-79 years over a median of 17.9 years, recording 33,892 incident cancer cases. The findings highlight associations between higher body roundness index and specific malignancies, even after adjusting for body mass index.

The details

Researchers calculated the body roundness index by using measurements of a participant's waist circumference and height to quantify abdominal adiposity. They then applied Cox proportional hazards models to estimate how these index levels correlated with the risk of developing various cancers. The study found independent associations between the index and cancers of the colon, kidney, liver, lung, and esophagus, suggesting that where the body stores fat may be as significant as total body weight.

October 23, 2026: Study analysis is released.
17.9 years: Median follow-up period for study participants.

Health Landscape

This study aligns with ongoing efforts by the National Institutes of Health's obesity and cancer research initiatives to identify specific biological markers that contribute to metabolic-driven malignancies. It signals a move away from body mass index as a sole metric for gauging long-term health risks.

These findings suggest that waist measurement may be a relevant metric to discuss during your regular physical exams, especially regarding metabolic and long-term health. Consider asking your doctor about which specific health markers, beyond standard weight, are most important to track given your personal medical history.

The takeaway

While body roundness index is an emerging tool in research, it is not a diagnostic test for cancer risk in everyday settings. Focus on maintaining a balanced lifestyle and discuss any changes in your health metrics, such as waist circumference, with your physician during routine checkups.