Adolescent' ability to correctly identify foods up to fourteen hours postprandial when prompted with an image of a meal

Mobile telephones are widely used throughout the world and can provide a unique mechanism for collecting dietary information that reduces burden on record keepers. Our belief is that allowing the user to interact with the mobile phone Food Record (mpFR) after the eating occasion removes one layer of burden while maintaining accuracy for nutrient analysis. The purpose of this study is to investigate adolescents' ability to correctly identify foods up to fourteen hours postprandial when prompted with an image of their meals. Fifteen adolescents (ages 11‐18 y) were provided lunch and dinner meals. The participants were asked to identify each food (fifteen foods total) in the image up to fourteen hours after the respective meal. One hundred percent of participants exactly identified five of the fifteen foods, i.e., milk, spaghetti, peaches, ketchup, and french fries. The other foods were identified within their same respective major food groups. For example, 80% of participants identified lettuce as salad and 33% labeled Coke as soda, pop, or cola. Further probing programmed into the mpFR would lead to an accurate identification of these food items. The results provide evidence that it is feasible to delay user interaction with the mpFR and still obtain accurate food identification.