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Journal of Obesity
Volume 2013, Article ID 147589, 7 pages
Research Article

Determinants of Fast Food Consumption among Iranian High School Students Based on Planned Behavior Theory

1Department of Health Education and Health Promotion, Isfahan University of Medical Sciences, Isfahan, Iran
2Kashani Hospital, Shahrekord University of Medical Science, Shahrekord, Iran
3Food Security Research Center, Department of Community Nutrition, School of Health & Nutrition, Isfahan University of Medical Sciences, Isfahan, Iran
4Department of Health Education and Health Promotion, Yazd Shahid Sadoughi University of Medical Sciences, Yazd, Iran
5Department of Statistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

Received 12 March 2013; Revised 18 June 2013; Accepted 18 June 2013

Academic Editor: Jennifer A. O'Dea

Copyright © 2013 Gholamreza Sharifirad et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This study was conducted to identify some factors (beliefs and norms) which are related to fast food consumption among high school students in Isfahan, Iran. We used the framework of the theory planned behavior (TPB) to predict this behavior. Subjects & Methods. Cross-sectional data were available from high school students who were recruited by cluster randomized sampling. All of the students completed a questionnaire assessing variables of standard TPB model including attitude, subjective norms, perceived behavior control (PBC), and the additional variables past behavior, actual behavior control (ABC). Results. The TPB variables explained 25.7% of the variance in intentions with positive attitude as the strongest ( , ) and subjective norms as the weakest ( , ) determinant. Concurrently, intentions accounted for 6% of the variance for fast food consumption. Past behavior and ABC accounted for an additional amount of 20.4% of the variance in fast food consumption. Conclusion. Overall, the present study suggests that the TPB model is useful in predicting related beliefs and norms to the fast food consumption among adolescents. Subjective norms in TPB model and past behavior in TPB model with additional variables (past behavior and actual behavior control) were the most powerful predictors of fast food consumption. Therefore, TPB model may be a useful framework for planning intervention programs to reduce fast food consumption by students.