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Behavioural and Environmental Factors Associated with Body Mass Index during Adolescence Open Access


Other title
Body mass index
Sedentary behaviour
Physical activity
Type of item
Degree grantor
University of Alberta
Author or creator
Kamal, Aliaa Fadel
Supervisor and department
Linda McCargar (Department of Agricultural, Food and Nutritional Science)
Examining committee member and department
Anna Farmer (Department of Agricultural, Food and Nutritional Science)
Tanya Berry (Physical Education and Recreation)
Department of Agricultural, Food, and Nutritional Science
Nutrition and Metabolism
Date accepted
Graduation date
Master of Science
Degree level
The growing prevalence of overweight and obesity in adolescents is of great concern. The objective of this research was to assess the relationship between body mass index (BMI) and individual factors such as: dietary intake, physical activity and sedentary behaviours; and to assess the relationship between BMI and interpersonal factors such as: food availability and encouragement of activity. A web-based survey of physical activity and nutrition (WebSPAN2) was completed by 4360 adolescents in grades 7 to10 in Alberta. Results from this study suggest that gender and grade level contributed significantly to BMI. Insufficient physical activity and extended periods of time spent in sedentary behaviours were the only modifiable risk factors associated with a higher BMI of adolescents. The variable, ‘nutrition beliefs’ was positively associated with BMI. Cohort studies are required to clarify the relative importance of individual and interpersonal factors on BMI during adolescence.
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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