Close Menu

Predictive Utility of Anthropometric Based Cut-offs in Assessing Excess Adiposity among Preschool Children in a Multiethnic Population

DOI: 
10.7727/wimj.2015.485

ABSTRACT

Objective: Screening for childhood obesity is a necessary step in developing appropriate and effective interventions.  We evaluated the diagnostic performance of various recommended international anthropometric cut-offs based on body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR),  triceps skinfold (TSF) and mid-upper arm circumference (MUAC) in predicting excess adiposity (body fat ≥ 25%) in a random sample of Trinidadian preschoolers.

Methods: After obtaining written parental consent, weight, height, WC, triceps and MUAC were measured in 596 children using standard procedures.  These were used to calculate BMI-for-age, WHtR, TSF-for-age z-scores and MUAC-for-age z-scores.  Percentage body fat was measured using a Tanita-531 foot-to-foot bioelectrical impedance analyser.  Sensitivities, specificities and area under the receiver-operating curve (AUC) analysis and predictive values were then computed.

Results: The prevalence of excess adiposity was 12.2% and 5.1% among males and females respectively.  Sensitivities for the various cut-offs ranged from 20.0%‒75.0% and 57.1 ‒ 96.9% among males and females respectively. WHO-BMI recommended cut-offs and those based on MUAC z-scores had significantly higher sensitivities in females than males. Triceps skinfold z-scores had significantly lower sensitivities compared to those based on BMI and WHtR among males.  Similarly, specificities ranged from 81.3%‒99.9% and 79.8%‒99.9% among males and females, respectively. In girls, cut-offs based on TSF z-scores had a higher likelihood ratio than cut-offs from CDC, IOTF and WHtR.  Diagnostic performance was not associated with ethnicity.

Conclusion: Our results suggest that diagnostic performance was associated with gender and the cut-offs used, however it was not associated with ethnicity.

Accepted: 
30 Sep, 2015
PDF Attachment: 
e-Published: 15 Mar, 2016

Disclaimer

Manuscripts that are Published Ahead of Print have been peer reviewed and accepted for publication by the Editorial Board of the West Indian Medical Journal. They may appear in their original format and may not be copy edited or formatted in the style guide of this Journal. While accepted manuscripts are not yet assigned a volume, issue or page numbers, they can be cited using the DOI and date of e-publication. See our Instructions for Authors on how to properly cite manuscripts at this stage. The contents of the manuscript may change before it is published in its final form. Manuscripts in this section will be removed once they have been issued to a volume and issue, but will still retain the DOI and date of e-publication.

Top of Page