The Stockholm Birth Cohort Study (SBC) was created in 2004/2005 by a probability matching of two comprehensive and longitudinal datasets. The first, the Stockholm Metropolitan study 1953–1985, consists of all children born in 1953 and living in the Stockholm metropolitan area in 1963. The second, The Swedish Work and Mortality Database 1980–2009 (WMD), consists of all individuals living in Sweden in 1980 or 1990, and born before 1985. The initiative to create the database was taken by Denny Vågerö at the Centre for Health Equity Studies, CHESS, of Stockholm University/Karolinska Institute and Sten-Åke Stenberg at the Swedish Institute for Social Research, Stockholm University (SOFI). The resulting database provides a 50 year long follow-up of the original 1953 birth cohort.