Ethnic Differences in Fat Distribution in Obese Adolescents
Author Information
Author(s): Liska David, Dufour Sylvie, Zern Tosca L., Taksali Sara, Calí Anna M.G., Dziura James, Shulman Gerald I., Pierpont Bridget M., Caprio Sonia
Primary Institution: Yale University School of Medicine
Hypothesis
Obese Hispanic and African-American youth would have higher intramyocellular and liver fat content than their Caucasian counterparts.
Conclusion
Obese Hispanic adolescents have greater intramyocellular lipid content than both Caucasians and African Americans, despite similar overall obesity levels.
Supporting Evidence
- Hispanic adolescents had significantly higher intramyocellular lipid levels than both African American and Caucasian peers.
- Liver fat content was undetectable in African American adolescents.
- Visceral fat was significantly lower in African Americans compared to Caucasians and Hispanics.
- Ethnicity explained 10% of the variance in intramyocellular lipid content.
- Despite similar obesity levels, fat distribution varied significantly by ethnicity.
Takeaway
This study found that Hispanic teens store more fat in their muscles and liver than Caucasian and African American teens, even if they weigh the same.
Methodology
The study used magnetic resonance spectroscopy and imaging to measure fat content in muscles and liver among different ethnic groups of obese adolescents.
Potential Biases
Potential biases may arise from self-reported ethnicity and the homogeneity of the sample.
Limitations
The study's cross-sectional design limits causal inferences, and it lacked data on physical fitness and diet composition.
Participant Demographics
Participants included 21 Caucasian, 17 African-American, and 17 Hispanic adolescents, all overweight or obese.
Statistical Information
P-Value
p=0.013 for IMCL differences
Confidence Interval
1.71% [1.43%, 2.0%] for Hispanics; 1.04% [0.75%, 1.34%] for African Americans; 1.2% [0.94%, 1.5%] for Caucasians
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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