The third round of 2013 Cohort householders were surveyed by the National Institute of Statistics between May and November 2019. The target population were children were between 5 and 10 years old at the time of Round 1 in 2013-2014, and resided in private homes in towns of 5,000 or more throughout Uruguay. This totaled 2,215 interviewed households, with a total of 2,474 children. Of these, 1,615 responded in all three rounds of the 2013 cohort.

The main questionnaire of the survey included a broad set of questions on socioeconomic conditions, reproductive history, work history of mothers, parenting practices, food safety, and habits and guidelines of child development. Interviewers also conducted anthropometric measurement and developmental assessments.