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Related Experiment Videos

Does Reverse Causality Underlie the Temporal Relationship Between Depression and Crohn's Disease?

Lawrence S Gaines1,2, James C Slaughter3, David A Schwartz1

  • 1Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, Nashville, Tennessee, USA.

Inflammatory Bowel Diseases
|July 10, 2019
PubMed
Summary

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Depression significantly predicts Crohn

Area of Science:

  • Gastroenterology
  • Psychiatry
  • Epidemiology

Background:

  • Previous studies explored the link between depression and Crohn's disease (CD) activity.
  • These studies often assumed a one-way relationship, neglecting reverse causality or symptom overlap.
  • This research investigates a potential bidirectional relationship between CD activity and depression.

Purpose of the Study:

  • To evaluate reverse causality in the depression-Crohn's disease (CD) relationship.
  • To determine if depression predicts CD activity more strongly than CD activity predicts depression.
  • To analyze the affective-cognitive dimension of depression's impact on patient-reported CD activity.

Main Methods:

  • A cohort of 3307 adults with self-reported Crohn's disease (CD) was surveyed.
Keywords:
depressionpatient-reported CD activitytemporal relationship

Related Experiment Videos

  • Data included demographics, CD activity, and an affective-cognitive depression index at baseline, 6, and 12 months.
  • Structural equation models were used to compare the predictive power of depression on CD activity versus CD activity on depression.

    • Main Results:

    • Informative hypothesis testing indicated stronger support for depression predicting CD activity.
    • The affective-cognitive dimension of depression emerged as a more significant predictor of patient-reported CD activity.
    • The model where depression predicts CD activity was substantially more likely to explain the data.

    Conclusions:

    • The affective-cognitive aspect of depression is a stronger predictor of Crohn's disease (CD) activity.
    • This finding suggests depression may precede and influence CD exacerbations.
    • The relationship between depression and CD activity is likely not spurious and warrants further investigation into causality.