More than a third of adults in the United States patronize fast-food restaurants and pizza parlors on any given day. And the higher their income, the more likely they are to do so.

The Centers for Disease Control and Prevention has released data on fast food consumption gathered from 2013 to 2016 in the National Health and Nutrition Examination Survey, or Nhanes, a program that continuously monitors the health and nutritional status of Americans.

The Nhanes analysis relies on physical examinations and in-person interviews to produce demographic, socioeconomic and health data, including dietary information from a representative sample of about 10,000 adults over the four years.

Fast food — defined broadly in the survey as any item obtained from a “fast food/pizza” establishment — is eaten by 37 percent of American adults at some point during the day.