Threat-sensitivity in affective disorders: A case-control study.

Area of Science:

• Psychiatry
• Neuroscience
• Psychology

Background:

• Anxiety disorders and major depressive disorder (MDD) frequently co-occur.
• Differences in symptom profiles and treatment responses suggest underlying distinctions.
• Threat sensitivity is a potential differentiating factor, but its specific links to disorders need clarification.

Purpose of the Study:

• To investigate the relationship between threat sensitivity and specific disorders: Panic Disorder (PD), Generalized Anxiety Disorder (GAD), and MDD.
• To examine behavioral and self-reported threat sensitivity in patient groups and healthy controls.
• To explore potential sex differences in threat sensitivity across these conditions.

Main Methods:

• Recruited 100 patients (35 PD, 32 GAD, 33 MDD) and 35 healthy controls.
• Assessed threat sensitivity using the Joystick Operated Runway Task (JORT) for behavior and the Fear Survey Schedule (FSS) for self-report.
• Analyzed group differences and sex interactions in sensitivity to simple and complex threats.

Main Results:

• Females exhibited higher behavioral sensitivity to simple and complex threats than males.
• Patients with PD reported higher sensitivity to physical threat (FSS Tissue Damage Fear) than other groups.
• All patient groups showed higher self-reported sensitivity to social threat (FSS Social Fear) compared to controls.

Conclusions:

• Elevated sensitivity to physical threat differentiates anxiety disorders from MDD.
• Heightened sensitivity to social threat is associated with both anxiety disorders and MDD.
• Findings challenge a simple/complex threat dichotomy, suggesting distinct threat processing patterns in these conditions.