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Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
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Do depressive symptoms predict paranoia or vice versa?

Steffen Moritz1, Anja S Göritz2, Benjamin McLean3

  • 1Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

Journal of Behavior Therapy and Experimental Psychiatry
|November 8, 2016
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Summary
This summary is machine-generated.

Depression predicts paranoia over a longer period, while paranoia predicts depression in the short term. Treatments should address both paranoia and depression in patients with psychosis.

Keywords:
AvoidanceDelusionsDepressionParanoiaSleepWorry

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Mental Health Research

Background:

  • Affective and nonaffective psychoses are increasingly viewed as overlapping conditions.
  • Affective symptoms, such as negative self-beliefs and worry, are implicated in paranoid belief formation.
  • These symptoms exist on a continuum within the general population.

Purpose of the Study:

  • To investigate the bidirectional causal relationships between paranoia and affective symptoms.
  • To examine the predictive associations between subclinical paranoid beliefs and depressive symptoms over time.

Main Methods:

  • A large population sample (N=2,357) was assessed at three time points over two years.
  • Subclinical paranoid beliefs were measured using the Paranoia Checklist (PCL).
  • Depressive symptoms were assessed using the Patient Health Questionnaire-9 (PHQ-9), with worrying and avoidance measured by the MAX questionnaire.

Main Results:

  • Depression and paranoid symptoms showed a strong cross-sectional relationship (r=0.69) and high stability.
  • Depressive symptoms at time point 2 predicted paranoid symptoms at time point 3 (beta=0.16).
  • Paranoid symptoms at time point 1 predicted depressive symptoms at time point 2 (beta=0.09).

Conclusions:

  • The predictive link from depression to paranoia was small and occurred over a longer interval.
  • Further research is needed in clinical samples of paranoid patients.
  • Treatments should target both paranoia and depression, as patients prioritize emotional well-being.