External validity for estimating dietary intakes using a recipe based dish-database and the estimation of salt intake.

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We collected existing dietary record data from different populations in Japan for the purpose of dietary assessment using recipe based typical dish-database. Data included names of mixed dishes or food names for single foods, ingredient foods, and their weights. We examined the external validity for estimating dietary intakes using a recipe based dish-database among an urban population that differ from the area where the database was developed. The applicability for estimating dietary intakes using the recipe based dish-database for urban populations was suggested. Furthermore, taste preference was suggested to be a defining feature of whole dietary salt intake, and therefore an improvement of estimation of whole salt intake can be expected through the application of self-reported taste preference to an assessment system using recipe based dish-database.