The data contains a derived and cleaned file with selected variables from the "Brabantse zesdeklassers, 1952-2010" file prepared by Mars Cramer and Mirjam van Praag, Persistent identifier: urn:nbn:nl:ui:13-z1p-xu6The data contains information on a cohort of Dutch students who were in the final grade of primary school in 1952 in the province of Noord-Brabant. These students were later followed-up in 1983 and 1993. The variables in this project include information on intelligence and parental background from 1952, and socioeconomic and health outcomes measured in 1983 and 1993.