TABLE 1.

Description of differences between What We Eat in America–NHANES and the Homescan panel¹

	What We Eat in America, diet component of NHANES	Nielsen Homescan Panel
Years of data used	2003–2006 2009–2012	2000–2013
Sample representation	Nationally representative sample of US residents aged >2 y	Large panel of US households from 48 contiguous states across 76 metropolitan and nonmetropolitan areas
Levels of measurement	Individual Dietary intake on foods and beverages consumed One 24-h recall	Household Purchases of CPGs Every reported shopping episode
Nutrient information linked to	Year or wave-specific USDA Food and Nutrient Database for Dietary Surveys	Year-specific Nutrition Facts Label information from various sources
Potential source of underreporting or missing data	Social desirability (underreporting of less-healthy consumption) Forgotten foods Portion size estimation	Nonpackaged foods (e.g., random-weight meats, store-prepared ready-to-eat or ready-to-eat foods, loose fruits or vegetables) On-the-go packaged foods that are unreported because of  quick consumption Social desirability (underreporting of less-healthy purchases)
Potential source of overreporting	Social desirability (overreporting of healthier consumption) Portion size estimation	Food waste Spoilage

¹CPG, consumer packaged goods (food and beverages sector).