Abstract
Objective. Although Aboriginal children seem to be more susceptible to developing obesity and metabolic disorders than other ethnic groups in Canada, few studies have examined adiposity comprehensively in this population. The purpose of this study was to assess total and central adiposity in Canadian Aboriginal and Caucasian children matched by age, gender and maturity. Methods. A total of 212 Aboriginal and 204 Caucasian children (8–17 years) were recruited. Heights, weights and waist circumferences were measured and classified using international standards. Dual energy x-ray absorptiometry (DXA) indicated relative total body and trunk fatness. Age of peak height velocity was predicted from somatic growth. Descriptives with independent t-tests and Chi-square analyses were run to detect ethnic differences. ANCOVA was used to assess differences in total body and trunk fatness (covariates height, chronological age and biological age) in girls and boys separately. Results. Overweight/obesity and central adiposity were more prevalent in Aboriginal children compared with Caucasian children (p < 0.05). Ethnic differences in total body and trunk fatness were also significant, with Aboriginal girls and boys presenting, on average, 5.4% and 6.0% more total body fatness and 7.6% and 8.3% more trunk fatness, than Caucasian girls and boys, respectively (p < 0.01). Conclusion. Canadian Aboriginal children have greater prevalence of overweight/obesity and central adiposity, and higher relative total body fatness and trunk fatness than their Caucasian peers, which may predispose them to cardiovascular and metabolic disorders at a very young age. Longitudinal research is needed to confirm the associated health risks in this population.
Acknowledgements
This study was supported by the Canadian Institutes of Health Research (CIHR), Heart and Stroke Foundation of Canada, Canadian Diabetes Association, Community Population Health Research; PBMAS was supported, in part, by the Canadian National Health and Research Development Program (NHRDP), the CIHR and the Saskatchewan Health Research Foundation. Special thanks to the Aboriginal students and teachers involved in this project, as significant assistance and cooperation was required from our partnering schools. The University of Saskatchewan should also be recognized for their support for this project.
Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.