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Waist Circumference Linked to Higher Mortality Risk in Menopausal Women: Study

A study published in Annals of Internal Medicine has revealed that menopausal women with larger waist circumference faced a higher risk of death across all body mass index (BMI) categories. Researchers emphasized that waist circumference is a simple and cost-effective measure for assessing health risks. The study was conducted by Aaron K. and fellow researchers.
BMI has been a widely used standard measure to evaluate obesity-related health risk for many years. It does not, however, measure fat distribution, particularly abdominal fat, which is more directly associated with chronic disease and mortality. In 2020, a consensus statement suggested BMI-specific WC cut points in an attempt to further stratify risk. The purpose of this study was to determine whether the use of these WC cut points in BMI categories would enhance prediction of 10- and 20-year mortality risks.
The analysis used data from 139,213 postmenopausal women 50 to 79 years old, sampled between 1993 and 1998, with follow-up through 2021. Patients were split into a development cohort (n = 67,774) and two external validation cohorts:
• Validation Cohort 1 (n = 48,335), supplemented with overweight and obese women
• Validation Cohort 2 (n = 23,104), with women from varied and geographically remote U.S. centers
Height, weight, and waist circumference were assessed at recruitment. Participants were stratified into five BMI groups:
• Normal weight (18.5–<25 kg/m²)
• Overweight (25–<30 kg/m²)
• Obesity-1 (30–<35 kg/m²)
• Obesity-2 (35–<40 kg/m²)
• Obesity-3 (≥40 kg/m²)
Each of the BMI groups was also stratified according to WC cutpoints:
≥80 cm for normal weight,
≥90 cm for overweight,
≥105 cm for obesity-1,
≥115 cm for obesity-2 and 3.
Key findings
• During a median follow-up of 24 years, 69,297 women died.
• Normal BMI but increased WC: HR = 1.17 (95% CI, 1.12–1.21)
• Overweight with increased WC: HR = 1.19 (CI, 1.15–1.24)
• These risks were comparable to women with obesity-1 and normal WC: HR = 1.12 (CI, 1.08–1.16)
• Obesity-1 with increased WC: HR = 1.45 (CI, 1.35–1.55)
• This risk was comparable with those with obesity-3 and normal WC: HR = 1.40 (CI, 1.28–1.54)
• For Validation Cohort 1, WC addition increased c-statistics by 0.7% (from baseline to 61.3%) and continuous NRI by 20.4% (CI, 17.3–23.6%) at 10 years.
• For Validation Cohort 2, there was a 12.3% improvement in risk stratification (CI, 8.5–16.0%) but no consistent improvement in discrimination.
• The results at 20 years were comparable to those at 10 years, suggesting long-term applicability of these measures.
In this big cohort of postmenopausal women, categorizing BMI by waist circumference thresholds modestly enhanced prediction of mortality risk, especially for women with greater abdominal fat. These data argue in favor of routine incorporation of waist circumference into assessment of obesity and cardiovascular risk in older women.
Reference:
Aragaki, A. K., Manson, J. E., LeBlanc, E. S., Chlebowski, R. T., Tinker, L. F., Allison, M. A., Haring, B., Odegaard, A. O., Wassertheil-Smoller, S., Saquib, N., Masaki, K., Harris, H. R., Jager, L. R., Bea, J. W., Wactawski-Wende, J., & Anderson, G. L. (2025). Development and validation of body mass index-specific waist circumference thresholds in postmenopausal women : A prospective cohort study: A prospective cohort study. Annals of Internal Medicine, ANNALS-24-00713. https://doi.org/10.7326/ANNALS-24-00713
Dr Riya Dave has completed dentistry from Gujarat University in 2022. She is a dentist and accomplished medical and scientific writer known for her commitment to bridging the gap between clinical expertise and accessible healthcare information. She has been actively involved in writing blogs related to health and wellness.
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751