Featured Research

from universities, journals, and other organizations

BMI Criteria For Obesity Surgery Should Be Lowered, Researchers Suggest

Date:
December 19, 2007
Source:
UT Southwestern Medical Center
Summary:
Researchers have found that the existing body mass index criteria for obesity surgery often excludes a group of obese patients at risk of cardiovascular disease.

UT Southwestern Medical Center researchers have found that the existing body mass index criteria for obesity surgery often excludes a group of obese patients at risk of cardiovascular disease.

Related Articles


The study, appearing in the December issue of the journal Surgery for Obesity and Related Diseases, is among the first to evaluate the risk-factor relationship between body mass index (BMI) and cardiovascular disease as it relates to bariatric surgery criteria, said Dr. Edward Livingston, chairman of GI/endocrine surgery at UT Southwestern and lead author of the study.

“Our results show that cardiovascular risk factors do not necessarily worsen with increasing obesity,” Dr. Livingston said. “They also support the concept that obesity, by itself, doesn’t trigger an adverse cardiovascular risk profile or increased risk of death.”

The researchers examined patient data from the Third National Health and Nutrition Examination Survey database for the presence of known cardiovascular risk factors as a function of obesity. The survey was a cross-sectional study conducted from 1988 to 1994. All 17,234 participants had a BMI greater than 20.  

BMI is a weight-to-height ratio commonly used in doctors’ offices to gauge obesity. A normal BMI is between 18.5 and 25, whereas someone with a BMI of 40 or more is at least 100 pounds over their recommended weight and is considered morbidly obese.

Bariatric weight-loss surgery is currently recommended for patients with a BMI greater than 40, as well as for patients with a BMI greater than 35 who also suffer from a life-threatening illness, such as non-insulin dependent diabetes, sleep apnea or heart disease.

The study findings show that some morbidly obese patients have better cardiovascular disease risk profiles than those who are less obese. In particular, the researchers found that cardiovascular risk factors can be much worse in many individuals with a BMI as low as 30 than they are for some surgical candidates with higher BMIs.

This suggests that some patients who are obese but not morbidly obese could benefit from bariatric surgery, which can help reduce cardiovascular disease, said Dr. Livingston.

Dr. Nicola Abate, associate professor of internal medicine in the Center for Human Nutrition at UT Southwestern and the study’s co-author, said it’s possible that very obese patients simply have a greater capacity to store excessive calories in their adipocytes, or fat cells, thereby preventing excessive fat from spilling into the bloodstream, where it contributes to heart disease.  

“Our findings suggest that there is a group of individuals who have an almost unlimited ability to store excess calories as fat. This prevents changes in plasma metabolites, such as triglycerides and cholesterol, which promote risk for heart disease,” Dr. Abate said. “In contrast, those who can’t store as much fat and who only accumulate fat in the upper body often have excessive plasma concentrations of triglycerides and cholesterol, which will increase their risk for heart disease. Even though their BMI may be below the current recommended cutoff, these patients could potentially benefit from bariatric surgery.”

Dr. Manisha Chandalia, associate professor of internal medicine in the Center for Human Nutrition, co-authored the study.


Story Source:

The above story is based on materials provided by UT Southwestern Medical Center. Note: Materials may be edited for content and length.


Cite This Page:

UT Southwestern Medical Center. "BMI Criteria For Obesity Surgery Should Be Lowered, Researchers Suggest." ScienceDaily. ScienceDaily, 19 December 2007. <www.sciencedaily.com/releases/2007/12/071218101221.htm>.
UT Southwestern Medical Center. (2007, December 19). BMI Criteria For Obesity Surgery Should Be Lowered, Researchers Suggest. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2007/12/071218101221.htm
UT Southwestern Medical Center. "BMI Criteria For Obesity Surgery Should Be Lowered, Researchers Suggest." ScienceDaily. www.sciencedaily.com/releases/2007/12/071218101221.htm (accessed October 25, 2014).

Share This



More Health & Medicine News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Texas Nurse Nina Pham Cured of Ebola

Texas Nurse Nina Pham Cured of Ebola

AFP (Oct. 25, 2014) — An American nurse who contracted Ebola while caring for a Liberian patient in Texas has been declared free of the virus and will leave the hospital. Duration: 01:01 Video provided by AFP
Powered by NewsLook.com
IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) — IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) — A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com
WHO: Millions of Ebola Vaccine Doses by 2015

WHO: Millions of Ebola Vaccine Doses by 2015

AP (Oct. 24, 2014) — The World Health Organization said on Friday that millions of doses of two experimental Ebola vaccines could be ready for use in 2015 and five more experimental vaccines would start being tested in March. (Oct. 24) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins