Subjects were first asked a set of questions dealing with socio-demographic and occupational characteristics including: age, sex, whether they were in a stable relationship ('yes' vs 'no'), level of education ('secondary or lower', 'university degree', 'doctorate'), occupation type ('TRS',...
(Drs Seidman and Tsuang), University of North Carolina, Chapel Hill (Dr Perkins); Departments of Psychology and Psychiatry, Emory University, Atlanta, Georgia (Dr Walker); and Schizophrenia Spectrum Disorders Research Program, Division of Adult Translational Research, National Institute of Mental ...