University of Glasgow
University of Edinburgh
Correspondence: J.T.O. Cavanagh, Senior Lecturer in Psychiatry, University of Glasgow Department of Psychological Medicine, Academic Centre, Gartnavel Royal Hospital, Great Western Road, Glasgow G12 0XH, UK. Tel: 0141 211 3926; fax: 0141 357 4899; e-mail: Jonathan.Cavanagh{at}clinmed.gla.ac.uk
See pp. 313319 and
editorial, pp. 293295,
this issue.
Background Neurocognitive impairments in euthymic patients with bipolar disorder may represent trait rather than state variables.
Aims To test the hypothesis that euthymic patients with bipolar disorder would exhibit impairment in verbal learning and memory and executive function compared with healthy controls matched for age, gender and premorbid IQ.
Method Twenty euthymic patients with bipolar disorder were matched, on a case-by-case basis, to twenty healthy community controls. Cases and controls were tested with a battery of neuropsychological tests.
Results Impairments were found in cases compared with controls in tests of verbal learning and memory. Verbal learning and memory correlated negatively with the number of manic episodes.
Conclusions Impaired verbal learning and memory may be a trait variable in bipolar disease. There are implications for adherence to medication and relapse and for the role of early treatment interventions. Prospective designs and targeting first-episode groups may help to differentiate trait v. disease process effects.
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