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Social Psychiatry and Psychiatric Epidemiology
Published in: Social Psychiatry and Psychiatric Epidemiology 1/2012

01-01-2012 | Original Paper

Mental health symptoms associated with morbidity, not mortality, in an elderly community sample

Authors: Philip J. Batterham, Helen Christensen, Andrew J. Mackinnon

Published in: Social Psychiatry and Psychiatric Epidemiology | Issue 1/2012

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Abstract

Purpose

Six previous reviews have found a relationship between depression and mortality. However, many past studies have failed to adequately control for the role of physical health. A proposed mechanism of the depression–mortality relationship suggests that physical health may mediate the relationship. The present study used new methods to examine relationships between mental health symptoms and mortality in an elderly community cohort while accounting for potential mediation of these relationships by physical health.

Method

896 community-dwelling participants aged 70–97 were assessed four times over 12 years and vital status was tracked for up to 17 years. Relationships of depression and anxiety with survival time, controlling for physical health, age and gender, were tested using Cox proportional hazards regressions embedded in structural equation models.

Results

A significant unadjusted relationship between depression symptoms and mortality (HR = 1.09, p < .001) was attenuated to non-significance after controlling for measures of physical health (HR = 1.03, p = .18). No significant relationship was found between anxiety symptoms and mortality.

Conclusions

The relationship between depression and mortality was accounted for by physical health status in this cohort. This finding casts doubt on studies that report a relationship between depression and mortality without adequately considering the effect of physical health.
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Metadata
Title
Mental health symptoms associated with morbidity, not mortality, in an elderly community sample
Authors
Philip J. Batterham
Helen Christensen
Andrew J. Mackinnon
Publication date
01-01-2012
Publisher
Springer-Verlag
Published in
Social Psychiatry and Psychiatric Epidemiology / Issue 1/2012
Print ISSN: 0933-7954
Electronic ISSN: 1433-9285
DOI
https://doi.org/10.1007/s00127-010-0313-0

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