Recent studies suggest a role for social factors during childhood in the later development of schizophrenia. Since social conditions in childhood are closely related to parental psychiatric illness, there is a need to disentangle how genes and social environmental factors interact.
Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet Norrbacka, Floor 7, 171 76, Stockholm, Sweden. susanne.wicks@ki.se