Perdue University West LaFayette
Improving Dietary Assessment Methods Using the Cell Phone and Digital Imaging
Carol Jo Boushey
Dietary intake provides some of the most valuable insights for mounting intervention programs for prevention. However, accurate assessment of diet is problematic. Emerging technology in mobile telephones (cell phones) with higher resolution pictures, improved memory capacity, and faster processors allows these devices to process information in a manner not previously possible. Mobile telephones are widely used throughout the world and can provide a unique mechanism for collecting dietary information that reduces burden on record keepers.
This project addresses several objectives of RFA-CA-07-032 by using cell phones to capture both visual and recorded detail that is electronically submitted to the researcher. This eases respondent burden and provides accurate estimates of nutrient, food, and supplement intakes. To adequately address these challenges, our research team has expertise in electrical engineering, computers, information science, nutritional epidemiology, stable isotopes, and statistics. Our goal is to develop, implement, and evaluate a mobile telephone food record (mpFR) that will translate to an accurate account of daily food and nutrient intake among adults.
Our first steps include development of imaging software for use with digital images that will estimate quantities of foods consumed, modification of the FNDDS nutrient database, and development of user-friendly interfaces. Images of food can be marked with a variety of input methods that link the item for image processing and analysis for quantification of food consumed.
We plan to recruit a sample of adults to consume meals of precisely known composition while using the mpFR under controlled conditions to aid with quantifying the error associated with the food and nutrient output. The users of the mpFR under these controlled conditions will provide feedback for improving the accuracy and ease of use of the mpFR. A convenient sample of 54 free-living, healthy adults between 21 and 65 years of age will participate in the validation phase where total energy expenditure will be measured over seven days with labeled water and compared to total energy intake over the same seven days as estimated from the mpFR. It is anticipated that the outcome of this project will be an innovate tool that can be used in population and clinical based studies to provide accurate dietary intake data.