For the study, Elbel's team surveyed fast-food restaurant eating choices of 483 boys and girls between the ages of 1 and 18 who dined in or took food to go from a McDonald's, Burger King, KFC, Wendy's or Subway between January 2013 and June 2014. All restaurants involved in the survey were located in New York or in Newark or Jersey City, NJ, and the parents of all dining youth were interviewed about their purchases based on meal receipts.