Mortality Risk of Obesity Underestimated?
Researchers have established that obesity is associated with increased mortality risk. However, a new study suggests that the severity of this risk may have been underestimated.
Published in Population Health Metrics (2014; doi:10.1186/1478-7954-12-6), the study looked at mortality and body mass index in nonsmoking adults aged 50–84. Data was pulled from the National Health and Nutrition Examination Surveys (1988–1994 and 1999–2004) and linked to the National Death Index through 2006.
“Using maximum BMI, hazard ratios for overweight (BMI, 25.0–29.9 kilogram/meter2), obese class 1 (BMI, 30.0–34.9 kg/m2) and obese class 2 (BMI, 35.0 kg/m2 and above) relative to normal weight (BMI, 18.5–24.9 kg/m2) were 1.28, 1.67, and 2.15, respectively,” explained study author and doctoral candidate Andrew Stokes. “The percentage of mortality attributable to overweight and obesity among never-smoking adults ages 50–84 was 33% when assessed using maximum BMI. The comparable figure obtained using BMI at time of survey was substantially smaller at 5%. The discrepancy is explained by the fact that when using BMI at time of survey, the normal category combines low-risk stable-weight individuals with high-risk individuals that have experienced weight loss. In contrast, only the low-risk stable-weight group is categorized as normal weight using maximum BMI.”
The bottom line?
“Use of maximum BMI reveals that estimates based on BMI at the time of survey may substantially underestimate the mortality burden associated with excess weight in the U.S.,” Stokes warned.
For the latest research, statistics, sample classes, and more, "Like" IDEA on Facebook here.
© 2014 by IDEA Health & Fitness Inc. All rights reserved. Reproduction without permission is strictly prohibited.
IDEA Newsletter Sign-up
|Extreme Interval Training
In this course you'll learn goal-focused intervals and over 50 dynamic exercises and drills to create extensive and intensive training formats.
|Cut to the Core
This is a raw, unedited video filmed live at the 2009 IDEA World Fitness Convention™. Cut to the Core is packed full of core-focused exercises that aim to improve the way you look, feel and live.
|September 2011 IDEA Fitness Journal Quiz 4: Plyometric Training
This continuing education quiz is an in-depth look at plyometric training. Plyometric exercises—jumping, bounding, hopping, arm pushing, and catching and throwing weighted objects such as machine balls—are movements that involve rapid eccentric and concentric muscle actions.