263524 Energy expenditure differs between Black and White Americans: Implications for obesity prevention research

Monday, October 29, 2012

Eduardo Velasco, MD, MSc, PhD , College of Osteopathic Medicine, Touro University California, Vallejo, CA
Nun Amen-Ra, DrPh , Amenta Alternative Psychotherapy, Damascus, MD
Mian B. Hossain, PhD , School of Community Health and Policy, Morgan State University, Baltimore, MD
Yvonne L. Bronner, ScD , School of Community Health and Policy, Morgan State University, Baltimore, MD
Our objective was to assess differences in energy expenditure by race and ethnicity, given our hypothesis that persons with lower resting energy expenditure will accrete bodyweight more readily and therefore rates of obesity should be higher in Blacks than in Whites. We used NHANES 2003-2004 to analyze a sample of 4655 US adults. Energy intake (EI) was taken to be the quantity of kilocalories reportedly consumed by participants on day 1 of the dietary intake examination. Voluntary energy expenditure (VEE) was estimated on the basis of accelerometers worn by participants. Intensity of activity was assessed by recording accelerations executed each minute by wearers of the device. We used the equation developed by Yngve and colleagues to convert accelerations per minute into metabolic equivalents (METs). We confirmed that Blacks exhibit lower resting energy expenditure than Whites—a difference of approximately 150 to 300 fewer kilocalories per day. This finding was significant in each permutation of our analysis—from the simple association of race and resting energy expenditure to our final regression model adjusted for common confounders (i.e. age, gender, income, and education), body fat content, diabetes, thyroid dysfunction, and weight loss in previous year. Our findings suggest that if rates of obesity are to be reduced in African Americans, recommendations would need to encourage lower levels of average energy intake and higher levels of activity energy expenditure than extant in the general populace. African Americans would need to adopt more austere lifestyle regimens relative to the general populace in order to reduce their obesity rate below present levels.

Learning Areas:
Chronic disease management and prevention

Learning Objectives:
Assess energy expenditure using US nationally representative data Compare energy expenditure differences between Black and White Americans Discuss implications of energy expenditure ethnic differences for obesity prevention

Keywords: African American, Obesity

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I am qualified to be an abstract author of the content because I am a public health researcher and practitioner who has published and obtained funding in the research area related to the abstract topic.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.