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Michael Blaha
Dr. Michael J. Blaha, MD, MPH — Professor of Cardiology and Epidemiology at Johns Hopkins Medicine; Director of Clinical Research for the Ciccarone Center for the Prevention of Cardiovascular Disease
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APPEARANCES
2
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Aug 14, 2026
BMI alone not the best way to assess cardiovascular risk
5:34
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2:56Michael BlahaGUEST
In many patients, the waist circumference and waist-hip ratio is a superior measure of body habitus and, and cardiovascular risk.
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3:05Michael BlahaGUEST
Particularly where this comes out the most is in patients who actually have normal weight by BMI or overweight by BMI.
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3:12Michael BlahaGUEST
Uh, because these patients might be told, well, they don't have obesity, but that might be hiding a large amount of fat and a small amount of lean muscle mass that puts patients at high risk.
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3:22Michael BlahaGUEST
So patients who have normal weight or patients who are overweight but have a proportionally higher waist circumference or waist-hip ratio are at markedly higher cardiovascular risk than those same patients who, you know, l- largely have lean muscle mass and, uh, have a low waist circumference relative to their BMI.
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3:40Michael BlahaGUEST
And even when you have obesity, the waist circumference and waist-hip ratio add on to this evaluation of obesity by the BMI and find out which patients are truly at the highest risk, whose weight is directed towards the waist, directed towards the abdomen where that fat tissue is highly metabolically active, inflammatory, and leads to these problems that we're so familiar with.

Norman SwanHOST
What are some of the limitations around using waist circumference and waist to hip ratio?
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5:39Michael BlahaGUEST
There's really no limitation per se, but the biggest thing is it's not in practice in an everyday way like BMI is.
BMI fails the test as a predictor of disease risk
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15:41Michael BlahaGUEST
In many patients, the waist circumference and waist-hip ratio is a superior measure of body habitus and, and cardiovascular risk.
M
15:49Michael BlahaGUEST
Particularly where this comes out the most is in patients who actually have normal weight by BMI or overweight by BMI.
M
15:56Michael BlahaGUEST
Uh, because these patients might be told, well, they don't have obesity, but that might be hiding a large amount of fat and a small amount of lean muscle mass that puts patients at high risk.
M
16:06Michael BlahaGUEST
So patients who have normal weight or patients who are overweight but have a proportionally higher waist circumference or waist-hip ratio are at markedly higher cardiovascular risk than those same patients who, you know, l- largely have lean muscle mass and, uh, have a low waist circumference relative to their BMI.
M
16:25Michael BlahaGUEST
And even when you have obesity, the waist circumference and waist-hip ratio add on to this evaluation of obesity by the BMI and find out which patients are truly at the highest risk, whose weight is directed towards the waist, directed towards the abdomen where that fat tissue is highly metabolically active, inflammatory, and leads to these problems that we're so familiar with.
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18:18Belinda SmithHOST
What are some of the limitations around using waist circumference and waist-hip ratio?
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18:21Michael BlahaGUEST
ratio?There's really no limitation per se, but the biggest thing is it's not in practice in an everyday way like BMI is.