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John O'Brien a Department of Psychiatry
and Institute for the Health of the Elderly, University of Newcastle
upon Tyne, Newcastle General Hospital, Newcastle upon Tyne NE4 6BE, b University of Melbourne Department of Psychiatry, Royal
Melbourne Hospital, Parkville, Victoria 3050, Australia, c Department of Radiology, Royal Melbourne
Hospital, Australia
Correspondence to Dr O'Brien j.t.o'brien{at}ncl.ac.uk
Objective To determine the difference in outcome
among elderly people with major depression who do and do not have severe white matter lesions on magnetic resonance imaging.
Design Follow up study.
Setting Two psychiatric and two general hospitals in
Melbourne, Australia.
Subjects 60 depressed subjects aged over 55 referred
to hospital psychiatric services with major depressive disorder meeting
American Psychiatric Association (DSM-IIIR) criteria.
Main outcome measure Proportion with good outcome as
determined by full recovery from initial illness and no evidence of
depressive relapse or cognitive decline during follow up among those
with and without lesions.
Results Mean (SD) follow up was 31.9 (9.9) months.
Survival analysis showed a significant effect of severe lesions on time
to poor outcome (P=0.04), with median survival 136 days in those with
severe lesions compared with 315 days in those without.
Conclusion Severe white matter change on magnetic
resonance imaging is associated with poor outcome in elderly depressed
subjects.
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