Evidence map›Paper›PMID 26621339›Full record

ReviewPsychological medicine2016

Depression as a systemic syndrome: mapping the feedback loops of major depressive disorder.

A K Wittenborn, H Rahmandad, J Rick, N Hosseinichimeh

Abstract readReview
In one paragraph

Review in Psychological medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

72 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. A System Dynamics Simulation Applied to Healthcare: A Systematic Review.International journal of environmental research and public health · 2020
    Pooled it
  3. Trial
  4. Article
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  7. Review
  8. The Potential of Personalized Post-Traumatic Stress Disorder Networks.Psychiatry and clinical psychopharmacology · 2025
    Article
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  20. Polysaccharides fromHeliyon · 2024
    Article

12 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

A K WittenbornDepartment of Human Development and Family Studies,Michigan State University,East Lansing,MI,USA.
H RahmandadSloan School of Management,Massachusetts Institute of Technology,Cambridge,MA,USA.
J RickDepartment of Human Development and Family Studies,Michigan State University,East Lansing,MI,USA.
N HosseinichimehDepartment of Industrial and Systems Engineering,Virginia Tech,Blacksburg,VA,USA.

Funding

Modeling the Dynamics of Adult DepressionR21MH100515 · NIMH · VIRGINIA POLYTECHNIC INST AND ST UNIV · PI WITTENBORN, ANDREA K · 2013 to 2014
$377k
NIMH NIH HHS R21 MH100515NIMH NIH HHS R21MH100515
6 · The paper itself

Abstract

backgroundDepression is a complex public health problem with considerable variation in treatment response. The systemic complexity of depression, or the feedback processes among diverse drivers of the disorder, contribute to the persistence of depression. This paper extends prior attempts to understand the complex causal feedback mechanisms that underlie depression by presenting the first broad boundary causal loop diagram of depression dynamics.

methodWe applied qualitative system dynamics methods to map the broad feedback mechanisms of depression. We used a structured approach to identify candidate causal mechanisms of depression in the literature. We assessed the strength of empirical support for each mechanism and prioritized those with support from validation studies. Through an iterative process, we synthesized the empirical literature and created a conceptual model of major depressive disorder.

resultsThe literature review and synthesis resulted in the development of the first causal loop diagram of reinforcing feedback processes of depression. It proposes candidate drivers of illness, or inertial factors, and their temporal functioning, as well as the interactions among drivers of depression. The final causal loop diagram defines 13 key reinforcing feedback loops that involve nine candidate drivers of depression.

conclusionsFuture research is needed to expand upon this initial model of depression dynamics. Quantitative extensions may result in a better understanding of the systemic syndrome of depression and contribute to personalized methods of evaluation, prevention and intervention.

Indexed as

Feedback, PsychologicalDepressionHumansMajor Depressive DisorderModels, PsychologicalPublic HealthFeedback loopsfeedback mechanismsmajor depressive disorderpersonalized medicinesystem dynamics

Identifiers

PMID26621339
PMCPMC4737091

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.