title: Does family history of schizophrenia influence age at onset of schizophrenia?
abstract: The relation between age at onset of schizophrenia diagnosed using DSM-III criteria and the presence or absence of this illness among first-degree relatives was investigated in 2417 patients. The mean age at onset among those with a family history of schizophrenia was slightly and nonsignificantly earlier than that of schizophrenic patients without a positive family history. The former developed their illness before the age of 25 years more frequently than did the latter.
authors.affiliation: Department of Neuropsychiatry, Faculty of Medicine, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Shimizu
authors.forename: M
authors.initials: M
authors.lastname: Kurachi
authors.forename: N
authors.initials: N
authors.lastname: Yamaguchi
authors.forename: H
authors.initials: H
authors.lastname: Torii
authors.forename: K
authors.initials: K
authors.lastname: Isaki
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008370:Manuals as Topic; D008875:Middle Aged; D012307:Risk Factors; D012559:Schizophrenia / Q000175:diagnosis / Q000235:genetics*; D012565:Schizophrenic Psychology