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1 Staff Psychiatrist, United States Air Force Medical Center, Keesler Air Force Base Biloxi, Mississippi
2 Associate Professor of Psychiatry, Department of Psychiatry, University of Iowa College of Medicine, State Psychopathic Hospital, 500 Newton Road, Iowa City, Iowa 52242, U.S.A.
3 Professor of Psychiatry, Department of Psychiatry, University of Iowa College of Medicine, Iowa City, Iowa
4 Staff Psychiatrist, Malcolm Bliss Mental Health Center, and Instructor in Psychiatry, Washington University School of Medicine, St. Louis, Missouri
5 Staff Psychiatrist, United States Air Force Medical Center, Lackland Air Force Base, San Antonio, Texas
Sixty poor-prognosis schizophrenic probands and their first-degree relatives were systematically interviewed blindly with regard to the subtypes of the probands. Comparisons were made between 32 paranoid probands and their families and 28 non-paranoid probands and their families. Besides definitional differences, paranoid probands had a later age of onset and a shorter total duration of stay in hospital. The only family differences between the two groups was a greater risk for the combination of schizophrenia, undiagnosed psychosis and paranoid personality in the non-paranoid group. The authors found no tendency for like subtype to go with like, nor any association between subtype and non-psychotic disorders.
Submitted on April 30, 1973
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