JAMA Netw Open. 2021 Apr 1;4(4):e215262. doi: 10.1001/jamanetworkopen.2021.5262.
IMPORTANCE: Time trends and population disparities in nutritional quality of foods from major US sources, including grocery stores, restaurants, schools, worksites, and other sources, are not well established.
OBJECTIVE: To investigate patterns and trends in diet quality by food sources among US children and adults overall and in sociodemographic subgroups.
DESIGN, SETTING, AND PARTICIPANTS: This serial, cross-sectional survey study included respondents from 8 National Health and Nutrition Examination Survey cycles (2003-2018) with valid dietary recalls. Data were analyzed from April 16, 2020, to July 20, 2020.
EXPOSURES: Survey cycle, food source,