Training for an innovative method to collect and analyze dietary intake data using still photographs

Abstract

Visual imaging technologies open doors to new ways of collecting and analyzing dietary intake information, which is particularly important for with intellectual, developmental, or communicative disabilities. Currently digital images are used entrepreneurially, and to a minor degree in research. However, validity of the nutrient analyses is lacking and standardized training for human photo interpreters needed. We show evaluation data from our registered dietitian training program on the dietary intake method, the photo taking and analysis protocols, and validity data from a recent study. Thirty‐two RD raters interpreted and analyzed a reliability series of 30 test meals. Their analyses at the food group level were compared to known meal contents. RD ratings were not clinically different for meal content or quantities for any food group. Mean differences between measured food amounts and RD reported amounts were: grains, .18 serving; vegetables, .64 serving; fruit, .01 serving; dairy, .10 serving; protein, .14 serving; discretionary calories, .11 serving. Supported by a grant from the National Institutes of Health, NIDDK.