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Harold E. Bays, MD Kathleen M. Fox, PhD Susan Grandy, PhD for the SHIELD Study Group

Waist circumference, hip circumference, body mass index (BMI) , and ratios: Which best predicts type 2 diabetes mellitus in men and women?. Harold E. Bays, MD Kathleen M. Fox, PhD Susan Grandy, PhD for the SHIELD Study Group.

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Harold E. Bays, MD Kathleen M. Fox, PhD Susan Grandy, PhD for the SHIELD Study Group

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  1. Waist circumference, hip circumference, body mass index (BMI) , and ratios: Which best predicts type 2 diabetes mellitus in men and women? Harold E. Bays, MD Kathleen M. Fox, PhD Susan Grandy, PhD for the SHIELD Study Group NAASO – The Obesity Society Annual Scientific Meeting, New Orleans October 24, 2007

  2. Background Adiposopathy is defined as pathogenic adipose tissue: • Promoted by positive caloric balance and sedentary lifestyle in genetically and environmentally susceptible patients • Anatomically manifested by adipocyte hypertrophy, adipose tissue accumulation (adiposity) in the visceral region, as well as ectopic fat (triglyceride) deposition in peripheral organs such as liver, muscle, and pancreas • Whose adverse metabolic and immune consequences result in clinical metabolic disease Bays HE et al. Future Cardiology. 2005;1(1):39-59 Bays HE. Expert Rev Cardiovas Ther. 2005;3(3):395-404

  3. Background Bays H, Ballantyne C. Future Lipidology. 2006;1(4):389-420

  4. Background EFRMD=excessive fat-related metabolic diseases Bays H, Ballantyne C. Future Lipidology. 2006;1(4):389-420

  5. Background Bays H, Ballantyne C. Future Lipidology. 2006;1(4):389420

  6. Adiposopathy: Visceral and Peripheral Adipose Tissue Bays H, Blonde L, Rosenson R. Expert Rev Cardiovas Ther. 4(6), 871–895 (2006)

  7. SHIELD • Study to Help Improve Early evaluation and management of risk factors Leading to Diabetes (SHIELD) • 5-year, national, longitudinal survey of diabetes, CVD, and cardiometabolic risk in US adults • Purpose: To better understand patterns of health behavior, knowledge and attitudes of people living with type 2 diabetes (T2DM) and those at high risk for its development • This analysis assessed anthropometric measures in predicting type 2 diabetes in men and women

  8. Objective • To assess gender-specific associations between type 2 diabetes and adipose tissue parameters

  9. Methods: Identifying Cohorts • Screening questionnaire mailed to 200,000 nationally representative US households • Part of the TNS* (formerly National Family Opinion) consumer panel • Responses for 211,097 adults from 127,420 households (64% response rate) • Used to identify individuals who self-reported: • T2DM and other metabolic diseases • Varying numbers of risk factors (0-5) associated with T2DM diagnosis • Follow up 64-item survey was sent to 22,001 people, along with tape measure and instructions for use • Type 1 diabetes (n=1000), T2DM (n=5000), History of gestational diabetes (n=1000), Control/at risk (n=15,000, ~2400 in each risk level) • Responses from 17,640 adults (80% response rate; 10,466 women & 6,686 men) *TNS = Taylor Nelson Sofres

  10. Risk Factor Definitions Risk FactorDefinition Abdominal obesity Men: waist circumference > 97cm Women: waist circumference >89 cm BMI 28 kg/m2 Dyslipidemia Diagnosed with cholesterol problems of any type Hypertension Diagnosed with high blood pressure CV event One or more CV problems or events (heart disease/myocardial infarction, narrow or blocked arteries, stroke, coronary artery bypass graft surgery/angioplasty/stents/surgery to clear arteries) BMI= body mass index; CV=cardiovascular

  11. Adipose Tissue Measures • Waist circumference (WC): assesses “pathogenic” visceral adipose tissue • Body mass index (BMI): assesses overall obesity, with most of total fat being “protective” subcutaneous adipose tissue • Hip circumference: “protective” gluteal subcutaneous adipose tissue • WC-BMI ratio: pathogenic / ”protective” adipose tissue ratio • WC-HC ratio: pathogenic / “protective” adipose tissue ratio

  12. Statistical Analyses • Distribution of measured and reported adipose tissue parameters by quintiles of all respondents • Analyses stratified by gender

  13. NHLBI Treatment Guidelines for Adult Obesity Bays H, Dujovne C. Curr Atheroscler Rep. 2006;8(2):144-156

  14. Results – T2DM Women The highest percent of women with T2DM occurred at the highest BMI and at the highest WC.

  15. Results – T2DM Women The highest percent of women with T2DM occurred at the lowest WC:BMI ratio, and the highest WC:HC ratio.

  16. Results – T2DM Men The highest percent of men with T2DM occurred at the highest WC.

  17. ATP III: The Metabolic Syndrome Diagnosis is established when 3 of these risk factors are present. Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults. JAMA 2001;285:2486-2497.

  18. Results – T2DM Men The highest percent of men with T2DM occurred at the highest WC:BMI ratio and the highest WC:HC ratio.

  19. Summary • In univariate analyses of women, the number of patients with T2DM gradually increased with increasing BMI, WC, and WC:HC ratio, but not WC:BMI, indicated that total peripheral, subcutaneous adipose tissue may not always be “protective” • In men, univariate analyses indicated that WC:HC ratio was a better predictor of T2DM than WC:BMI, WC, or BMI, possibly reflecting the pathogenic effects of having both increased visceral adipose tissue & relative lack of “protective” gluteal and peripheral, subcutaneous adipose tissue.

  20. Back up slides

  21. Six “Faces” of Adiposopathy Bays H, Blonde L, Rosenson R. Expert Rev Cardiovas Ther. 4(6), 871–895 (2006)

  22. Adiposopathy: Treatment “Finally, an emerging concept is that the development of anti-obesity agents must not only reduce fat mass (adiposity) but must also correct fat dysfunction (adiposopathy)” Bays HE. Obesity Research 2004; Vol. 12 No. 8:1197-1211.

  23. Adiposopathy: Treatment Adiposopathy treatments and their effects upon select parameters that promote type 2 diabetes mellitus Bays H, Blonde L, Rosenson R. Expert Rev Cardiovas Ther. 4(6), 871–895 (2006)

  24. Adiposopathy: Treatment Adiposopathy treatments and their effects upon select parameters that promote hypertension Bays H, Blonde L, Rosenson R. Expert Rev Cardiovas Ther. 4(6), 871–895 (2006)

  25. Adiposopathy: Treatment Adiposopathy treatments and their effects upon select parameters that promote dyslipidemia Bays H, Blonde L, Rosenson R. Expert Rev Cardiovas Ther. 4(6), 871–895 (2006)

  26. Bays H, Ballantyne C. Future Lipidology. 2006;1(4):389-420; Bays H et al. Expert Rev Cardiovasc Ther. 2005;3(5):789-820

  27. Bays H, Ballantyne C. Future Lipidology. 2006;1(4):389-420

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