Cluain Mhuire Community Psychiatric Service
St Loman's Hospital
Dublin Institute of Technology, Dublin, Ireland
Department of Community Medicine, Lund University, Sweden
St Loman's Hospital and Mental Health Section, Health Research Board, Ireland
Declaration of interest This study was funded by the Health Research Board, Ireland, and the Stanley Foundation.
Correspondence: Dr E. O'Callaghan, Cluain Mhuire Community Psychiatric Service, Newtownpark Avenue, Blackrock, County Dublin, Ireland. Tel: 353-1-2833766; fax: 353-1-2833886
Background Several reports postulate that manic depression and schizophrenia share environmental risk factors. Although obstetric adversity has been suggested as a risk factor for schizophrenia, few studies have examined its relationship to bipolar affective disorder.
Aims To assess the rate of obstetric complications incurred by patients with mania compared with controls.
Method From the Dublin Psychiatric Case Register we identified individuals with a discharge diagnosis of mania and traced their birth records. Each case was matched with a control of the same gender, born in the same hospital, in the same year, matched for maternal age, parity and social class. Two obstetric complication scales were used to make blind evaluations of labour and delivery data.
Results Patients with mania did not experience a greater frequency or severity of labour and delivery complications than their matched controls. Rates of obstetric adversity were unrelated to the presence or absence of family history of psychiatric disorder. Obstetric adversity was unrelated to the age at first diagnosis.
Conclusions These findings suggest that obstetric adversity is not a risk factor for later mania.
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