Fatemeh Bakhtari - Road Traffic Injury Research Center, Department of Health Education and Promotion, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran.
Haidar Nadrian - Road Traffic Injury Research Center, Department of Health Education and Promotion, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran.
Mohammad Asghari Jafarabadi - Road Traffic Injury Research Center, Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran.
Reza Dehghanzadeh - Department of Environmental Health, Health and Environment Research Center, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran.
Ziba Delangiz - Road Traffic Injury Research Center, Department of Health Education and Promotion, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran.

Background: Excessive use of plastic bags has become a major problem in the worldwide causing irreparable damages to the environment and humans. The purpose of this study was to identify the individual and environmental factors associated with the use of plastic bags among the vendors of Hadishahr city, Iran. Materials and Methods:This is a cross-sectional study conducted on 400 vendors working in Hadishahr city. The data were gathered using a researcher-made questionnaire, which measured knowledge and attitudes of vendors regarding the use of plastic bags at the individual level. At the environmental level, access to alternatives plastic bags and social support to use of alternative was measured. Plastic bags in kilograms per week was measured as the consumer behavior Data were analyzed using SPSS software via Chi-square, t-test and hierarchical regression tests. Result: The average usage of plastic bags by the vendors was 4.5 kg per week. 97.8% of vendors gave plastic bags for the customers to carryaway their purchased items. The individual-level factors (knowledge and attitude), along with social support for the use of alternatives taken from environmental factors were the most important predictors for the use of plastic bags; they were able to predict consumption behavior (15%) along with other variables. Conclusion: In order to reduce the plastic bags consumption while training, it is necessary to provide social support for the usage of alternatives and environmental access to these alternatives

Plastic Bags, Individual Factors, Environmental Factors