Obstetric complications and schizophrenia: prenatal underdevelopment and subsequent neurodevelopmental impairment

• Published in: British journal of psychiatry Vol. 178; no. S40; pp. s25 - s29
• Main Authors: Kunugi, H., Nanko, S., Murray, R. M.
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.04.2001; RCP
• Subjects: Adjustment; Birth weight; Brain - abnormalities; Brain - embryology; Brain damage; Brain injury; Cerebral palsy; Economic underdevelopment; Embryonic and Fetal Development; Epidemiology in Neurobiological Research; Female; Humans; Hypoxia - complications; Infant, Low Birth Weight - psychology; Infant, Newborn; Infant, Premature - psychology; Low birth weight; Mental disorders; Neurodevelopmental disorders; Obstetric Labor Complications; Obstetrics; Perinatal; Preeclampsia; Pregnancy; Pregnancy Complications - psychology; Premature babies; Premature birth; Premorbid; Prenatal care; Prenatal development; Prenatal Exposure Delayed Effects; Psychiatry; Psychosocial factors; Research subjects; Risk factors; Schizophrenia; Schizophrenia - etiology; Vulnerability
• ISSN: 0007-1250; 0960-5371; 1472-1465
• DOI: 10.1192/bjp.178.40.s25

Many studies have shown an association between obstetric complications and schizophrenia. To investigate the possible relationship between prenatal underdevelopment, neurodevelopmental abnormality and subsequent schizophrenia. The literature was reviewed. In particular, by pooling data from recently published reports, we examined whether low birthweight (< 2500 g) is a risk factor for schizophrenia. Low birthweight was significantly more common for subjects with schizophrenia than for control subjects: P < 0.00001, odds ratio 2.6 (95% CI 2.0 to 3.3). Individuals born prematurely are at greater risk of perinatal brain damage and subsequent neurodevelopmental abnormalities, which may constitute vulnerability to the development of schizophrenia. Patients with schizophrenia who had low birthweights also tended to have poor premorbid psychosocial adjustment. Low birthweight is a modest, but definite, risk factor for schizophrenia. Brain damage associated with prenatal underdevelopment has a role in the pathogenesis of poor premorbid functioning and subsequent neurodevelopmental impairment in some cases of schizophrenia.