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Health Behaviour, Dietary Supplements and Obesity: A Propensity Score Matching Approach Open Access


Other title
Propensity Score Matching
Health Behaviour
Type of item
Degree grantor
University of Alberta
Author or creator
Bemile, Esther N
Supervisor and department
Sven Anders, Department of Resource Economics and Environmental Sociology
Examining committee member and department
Kim, Raine (Public Health)
Goddard, Ellen (Resource Economics and Environmental Sociology)
Anders, Sven (Resource Economis and Environmental Sociology)
Rude, James (Resource Economics and Environmental Sociology)
Department of Resource Economics and Environmental Sociology
Agricultural and Resource Economics
Date accepted
Graduation date
Master of Science
Degree level
Despite significant efforts to inform and educate consumers across North America on healthy eating through “easy to follow” dietary guidelines, diet related non-communicable diseases are on the ascendancy. The objective of this thesis is to use the National Health and Nutrition Examination Survey (NHANES) 2007-2008 data to determine how dietary supplement users may differ from nonusers in body mass index (BMI) outcome and how the extent of dietary supplement intake through its effect on diet quality may affect BMI. Propensity Score Matching was used to account for the possible selection bias and endogeneity of the self-reported dietary supplement intake and treatment outcome variable in the NHANES data. The results suggest that the typical dietary supplement taker is a white female of higher socioeconomic status. Other results show that supplement consumption may be associated with significant lower BMI outcomes. However, we fail to confirm a linear relationship between the number of supplements consumed and BMI. Policy makers should intensify the public education on fruit and vegetable consumption to ensure that people largely meet their nutrient needs from food instead of dietary supplements due to the potential negative effect of overuse of dietary supplements.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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