Equal-Life has access to eight European cohorts, one national longitudinal school study, and two cross-sectional studies. The table below shows the included cohorts and school studies and the different age groups covered at baseline and follow up. The geography covered is primarily Western Europe (seven countries). The birth cohorts include at least 226,807 children (mother/child pairs) for whom longitudinal data are available of mental health and cognitive development endpoints, including biomarkers and epigenetics, and related exposures. The other studies include an additional 15,866 children, some of which also provide parental information and retrospective information on perinatal circumstances. 

The table below provides an overview of the cohort and school studies included in Equal-Life. In total, data are available for 242,673 children from preconception to 21 years.  Most data are collected at a regional, and two at national, scale (Finland and Germany) as presented in the figure below.