Featured Research

from universities, journals, and other organizations

Overweight Or Underweight, Causes Of Death Differ

Date:
November 7, 2007
Source:
JAMA and Archives Journals
Summary:
The association between weight and causes of death can vary considerably, with obesity associated with a significantly increased mortality from cardiovascular disease, underweight associated with increased mortality from primarily non-cancer, non-CVD causes, and overweight associated with increased mortality from diabetes and kidney disease combined, but with reduced mortality from other non-cancer non-CVD causes of death, according to a new study.

Obesity was found to be associated with a significantly increased mortality from cardiovascular disease (CVD), while underweight was associated with increased mortality from primarily non-cancer, non-CVD causes.
Credit: iStockphoto/Lisa Fletcher

The association between weight and causes of death can vary considerably, with obesity associated with a significantly increased mortality from cardiovascular disease (CVD), underweight associated with increased mortality from primarily non-cancer, non-CVD causes, and overweight associated with increased mortality from diabetes and kidney disease combined, but with reduced mortality from other non-cancer non-CVD causes of death, according to a new study.

"In a previous study, we estimated excess all-cause mortality associated with underweight, overweight, and obesity in the United States in 2000 using data from national surveys," the authors write. "We found significantly increased all-cause mortality in the underweight and obese categories and significantly decreased all-cause mortality in the overweight category compared with normal weight. To gain further insight into these findings, we now extend that work, using additional mortality data with longer follow-up, to examine the association of cause-specific mortality with different weight categories among U.S. adults in 2004."

Katherine M. Flegal, Ph.D., of the Centers for Disease Control and Prevention, Hyattsville, Md., and colleagues estimated the cause-specific excess deaths associated with underweight (body mass index [BMI] less than 18.5), overweight (BMI 25 to less than 30), and obesity (BMI 30 or greater). BMI is calculated as weight in kilograms divided by height in meters squared. The researchers analyzed data from the National Health and Nutrition Examination Survey (NHANES) I, 1971-1975; II, 1976-1980; and III, 1988-1994, which was combined with data on BMI and other covariates from NHANES 1999-2002 with underlying cause of death information for 2.3 million adults 25 years and older from 2004 vital statistics data for the United States.

Based on total follow-up, underweight was associated with a significantly increased mortality from noncancer, non-CVD causes (23,455 excess deaths) but not associated with cancer or CVD mortality. Overweight was associated with a significantly decreased mortality from noncancer, non-CVD causes but was not associated with cancer or CVD mortality.

Obesity was associated with a significantly increased mortality from CVD (112,159 excess deaths) but not associated with cancer mortality or with noncancer, non-CVD mortality. In further analyses, overweight and obesity combined were associated with increased mortality from diabetes and kidney disease (61,248 excess deaths) and decreased mortality from other noncancer, non-CVD causes. Obesity was associated with an increased mortality from cancers considered obesity-related (13,839 excess deaths) but not associated with mortality from other cancers. Comparisons across surveys suggested a possible decrease in the association of obesity with CVD mortality over time.

"Some evidence suggests that modestly higher weights may improve survival in a number of circumstances, which may partly explain our findings regarding overweight. Overweight is not strongly associated with increased cancer or CVD risk, but may be associated with improved survival during recovery from adverse conditions, such as infections or medical procedures, and with improved prognosis for some diseases. Such findings may be due to greater nutritional reserves or higher lean body mass associated with overweight," the authors write.

"... our data indicate that the association of BMI with mortality varies considerably by cause of death. These results help to clarify our earlier findings of excess overall mortality associated with underweight and obesity but not with overweight."

Journal reference: JAMA. 2007;298(17):2028-2037.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Cite This Page:

JAMA and Archives Journals. "Overweight Or Underweight, Causes Of Death Differ." ScienceDaily. ScienceDaily, 7 November 2007. <www.sciencedaily.com/releases/2007/11/071106164810.htm>.
JAMA and Archives Journals. (2007, November 7). Overweight Or Underweight, Causes Of Death Differ. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2007/11/071106164810.htm
JAMA and Archives Journals. "Overweight Or Underweight, Causes Of Death Differ." ScienceDaily. www.sciencedaily.com/releases/2007/11/071106164810.htm (accessed September 23, 2014).

Share This



More Health & Medicine News

Tuesday, September 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Costs Keep Mounting

Ebola Costs Keep Mounting

Reuters - Business Video Online (Sep. 23, 2014) The WHO has warned up to 20,000 people could be infected with Ebola over the next few weeks. As Sonia Legg reports, the implications for the West African countries suffering from the disease are huge. Video provided by Reuters
Powered by NewsLook.com
Liberia Pleads for Help to Fight Ebola

Liberia Pleads for Help to Fight Ebola

AP (Sep. 22, 2014) Liberia's finance minister is urging the international community to quickly follow through on pledges of cash to battle Ebola. Bodies are piling up in the capital Monrovia as the nation awaits more help. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Ebola Doctor Says Border Controls Critical

Ebola Doctor Says Border Controls Critical

AP (Sep. 22, 2014) A Florida doctor who helped fight the expanding Ebola outbreak in West Africa says the disease can be stopped, but only if nations quickly step up their response and make border control a priority. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Global Ebola Aid Increasing But Critics Say It's Late

Global Ebola Aid Increasing But Critics Say It's Late

Newsy (Sep. 21, 2014) More than 100 tons of medical supplies were sent to West Africa on Saturday, but aid workers say the global response is still sluggish. Video provided by Newsy
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