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Pediatrics

Changes in adiposity indicators of Ho Chi Minh City adolescents in a 5-year prospective cohort study

Abstract

Objective:

The aim of this study was to examine changes over 5 years in body mass index (BMI) and waist circumference (WC) of adolescents from Ho Chi Minh City by age, gender and household economic status.

Methods:

Anthropometry including height, weight and WC measurements of 759 secondary high school students were collected 1-year apart in a prospective cohort study, between 2004 and 2009. BMI was calculated and overweight/obesity was defined using International Obesity Task Force (IOTF) BMI cutoffs. Abdominal ‘overweight’ and ‘obesity’ were defined as WC >91st–97th and 98th centile, respectively. BMI z-scores were also created.

Results:

Over the 5-year period, the absolute changes in mean BMI and WC were statistically significant (P<0.001). Boys had higher BMI and WC values than girls (P<0.001). The prevalence of overweight and obesity defined by IOTF BMI cutoff values increased gradually from 12.5% and 1.7% in the first year to 16.7% and 5.1% in the last year. Using WC cutoff values, the prevalence of abdominal overweight and obesity increased from 12.9% and 1.8% to 18.5% and 6.6%, respectively. BMI z-score curves shifted towards the right-hand side of the distribution (that is, towards overweight and obesity).

Conclusion:

Overweight and obesity, as measured by BMI or WC, continued to increase among adolescents of Ho Chi Minh City over the 5-year period.

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Acknowledgements

We gratefully acknowledge the support by the staff of the Nutrition Centre, Ho Chi Minh City Health Department and all data collectors for their enormous help in data collection, entry and cleaning. The 5-year cohort study was funded by a grant from the Nestlé Foundation, Switzerland. One of the coauthors, Trang Nguyen HHD, received a partial PhD scholarship from The University of Sydney World Scholars and Hoc Mai Foundation, and the University of Sydney.

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Correspondence to T K Hong.

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Hong, T., Trang, N. & Dibley, M. Changes in adiposity indicators of Ho Chi Minh City adolescents in a 5-year prospective cohort study. Int J Obes 37, 1261–1267 (2013). https://doi.org/10.1038/ijo.2012.217

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