Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Obesity rates decline for many adolescents but disparities worsen

16.08.2010
Obesity rates have started to decline and level off for many adolescents, but continue to increase for certain racial and ethnic minorities, according to a new UCSF-led study.

The evidence of increasing racial disparities for obesity underscores the need for more tailored intervention programs and policies that target high-risk groups, the authors conclude.

The study, which is the first to find significant differences in obesity trends over time by race and ethnicity, appears online in the journal Pediatrics, available at http://pediatrics.aappublications.org/papbyrecent.dtl. It also will be published in the September 2010 print issue of the journal.

"While the decline and stabilization of obesity among certain groups is encouraging, we are seeing an increase in disparities that is troubling, especially among the most severely obese youth," said first author Kristine Madsen, MD, MPH, an assistant professor of pediatrics at UCSF. "As our country becomes increasingly diverse, it is critical that we act quickly to address these disparities."

Madsen and her co-authors examined trends in the prevalence of high body mass index (BMI) among Hispanic, non-Hispanic white, Asian, black, and American Indian adolescents in California from 2001 through 2008. BMI is a measure of body fat based on a person's height and weight that is commonly used to screen for obesity. Generally, children are considered obese if they have a BMI at or above the 95th percentile, and severely obese if their BMI score is at or above the 99th percentile.

The data revealed that obesity rates at the 95th percentile declined or stabilized among a number of groups during the time period studied. Among white and Asian girls and boys, obesity rates peaked in 2005, then declined over the next three years, with 2008 rates coming in at 12 percent for white youth and 13 percent for Asians. Overall rates for Hispanic youth also peaked in 2005 and then leveled off at 26 percent through 2008; although Hispanic boys did show a small decline on their own. Rates among black boys stayed at the same level each year.

However, from 2001 through 2008, the prevalence of obesity continued to climb for black and American Indian girls, reaching 22 percent and 23 percent, respectively. Furthermore, these two groups were more than three times as likely as white girls to be severely obese, with a BMI at the 99th percentile.

When comparing groups at the 99th BMI percentile, the researchers found that only Asian youth and white boys showed any signs of decline after 2005. All other groups – including Hispanic boys and girls, white girls, black boys and girls, and American Indian boys and girls – peaked in 2005 and then remained at a plateau through 2008.

"When you look at the very heaviest end of the spectrum, the picture is pretty bleak, and we do not yet know if severe obesity rates for these groups will remain at a plateau or continue to increase," Madsen added.

The researchers analyzed the health records of more than eight million fifth-, seventh-, and ninth-grade students in California who underwent the state's mandatory school-based BMI screening. Among the students studied, 46.4 percent were Hispanic, 32.8 percent were white, 12.6 percent were Asian, 7.7 percent were black, and 0.5 percent were American Indian.

According to the researchers, the study's large and highly diverse group of subjects is a unique strength. And, although the data were confined to one state, the results show population level trends that are applicable elsewhere, since about one in eight children in the United States currently live in California.

"We need to focus on implementing real change in the places where kids spend most of their time – at home, at school and in the after-school arena – to encourage healthier habits and reduce consumption," Madsen said. "Priorities must be reconsidered so that health is not an afterthought."

Co- authors on the paper include Patricia Crawford, DrPH, RD, of the Dr. Robert C. and Veronica Atkins Center for Weight and Health at University of California, Berkeley; and Ashley Weedn, MD, of the Department of Pediatrics at University of Oklahoma.

The research was supported by grants from the Robert Wood Johnson Foundation, the Eunice Kennedy Shriver National Institute of Child Health and Human Development, and the American Heart Association.

UCSF Benioff Children's Hospital creates an environment where children and their families find compassionate care at the forefront of scientific discovery, with more than 150 experts in 50 medical specialties serving patients throughout Northern California and beyond. The hospital admits about 5,000 children each year, including 2,000 babies born in the hospital. For more information, visit http://www.ucsfbenioffchildrens.org/.

UCSF is a leading university dedicated to promoting health worldwide through advanced biomedical research, graduate-level education in the life sciences and health professions, and excellence in patient care. For further information, please visit http://www.ucsf.edu/.

Follow UCSF on Twitter at http://twitter.com/ucsfnews

Kate Vidinsky | EurekAlert!
Further information:
http://www.ucsf.edu

More articles from Studies and Analyses:

nachricht WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf

nachricht First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>