The Open Public Health Journal




ISSN: 1874-9445 ― Volume 12, 2019
RESEARCH ARTICLE

Adolescent BMI: The Importance of Intrinsic and Extrinsic Factors



Molly Jacobs*
Department of Health Sciences Information and Management, College of Allied Health Science, East Carolina University, 600 Moye Blvd. Mail Stop 668, Health Sciences Building 4340E, Greenville, NC 27834, USA

Abstract

Objectives:

Research shows that weight trends in adolescence persist into adulthood, but do the same factors contribute to weight in adolescence as in adulthood? Are extrinsic factors presumably more important than intrinsic characteristics? This study identifies the correlation between BMI and various intrinsic and extrinsic factors and evaluates their relative importance in BMI development. It compares the primary determinants for adolescents (12-20 years old) and adults (21+ years old).

Methods:

Using 15 years of panel data, generalized linear models, we assessed the impact of extrinsic-environmental, biological, geographic and household-and intrinsic-sexual activity, substance use, desire to lose weight, etc.-characteristics on adolescent and adult BMI. Multinomial logit models tested the contribution of these characteristics to weight categories.

Results:

Race and age were the most significant BMI correlates at all ages. This remains true for weight classification as well. For young adolescents, intrinsic factors are highly deterministic, while extrinsic factors play no role. As adolescents age into adults, intrinsic factors continue to be deterministic, while extrinsic covariates also emerge as deterministic. Intrinsic determinates of significance include age of first sexual encounter, tobacco experimentation, perspective on general health, and desire to lose weight (or stay the same weight).

Conclusion:

While biological/genetic attributes are the largest determinants of BMI at every age, intrinsic factors play a larger role in adolescent BMI development than adults. As individuals age, intrinsic determinants remain important, but extrinsic characteristics contribute significantly to weight classification. Thus, the weight determinants differ between adolescents and adults suggesting different methods of policy intervention be used for adolescents and adults.

Keywords: Obesity, Adolescence, BMI, Mother, Intrinsic factors, Extrinsic factors, Multinomial logit models.


Article Information


Identifiers and Pagination:

Year: 2018
Volume: 11
First Page: 147
Last Page: 161
Publisher Id: TOPHJ-11-147
DOI: 10.2174/1874944501811010147

Article History:

Received Date: 11/12/2017
Revision Received Date: 5/4/2018
Acceptance Date: 13/4/2018
Electronic publication date: 30/04/2018
Collection year: 2018

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© 2018 Molly Jacobs.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


* Address correspondence to this author at the Department of Health Sciences Information and Management, College of Allied Health Science, East Carolina University, 600 Moye Blvd. Mail Stop 668, Health Sciences Building 4340E, Greenville, NC 27834, USA; Tel: 252-744-6182; E-mail: Jacobsm17@ecu.edu


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