TABLE 4.

Mean amounts of true and reported energy and nutrient intake for the lunch meal among school-age children (n = 100)¹

	Mean amount
Nutrient	True (SE)	Reported (SE)	Difference between true and reported (SE)2
Calories, kcal	542 (10)	755 (46)	−212 (44.8)*
Protein, g	20.3 (0.5)	27.1 (1.8)	−6.8 (1.7)*
Potassium, mg	762 (23)	798 (56)	−36.1 (56.0)
Sodium, mg	696 (12)	1239 (73)	543 (73.9)*

¹In some cases, children (n = 37) did not provide sufficient details on foods or beverages for food codes to be assigned within the ASA24 system. For these foods, FNDDS food codes were assigned to these foods and beverages by simulating children's responses by entering the food item (i.e., pizza) into ASA24 and selecting “don't know” for each subsequent prompt (e.g., “how much was eaten?”). The resulting food codes assigned within ASA24 were applied for the purpose of comparing true and reported energy and nutrient intakes. ASA24, Automated Self-Administered 24-Hour Dietary Assessment Tool; FNDDS, Food and Nutrient Database for Dietary Surveys.

²Values are mean differences between true and reported intakes ± SEs, n = 100. Mean differences reported were estimated with a paired 2-tailed t test. Values with an asterisk (*) were statistically significant at P < 0.05.