1. Theme 1: Personal factors
   1. Sub-theme 1: Fast food preference
   2. Sub-theme 2: Convenience
   3. Sub-theme 3: Price
2. Theme 2: Social environmental factor
   1. Sub-theme 1: Parent influence
3. Theme 3: Physical environmental factor
   1. Sub-theme 1: Community environmental influence
4. Theme 4: Macrosystem
   1. Sub-theme 1: Advertising