Dissociative Experience in Unipolar and Bipolar Depression: Exploring the Great Divide

Area of Science:

• Psychiatry
• Clinical Psychology
• Neuroscience

Background:

• Unipolar depression (UD) and bipolar depression (BD) share clinical similarities, often leading to misdiagnosis.
• Misdiagnosis can result in treatment failure and chronic illness.
• Neurobiological and clinical differences exist between UD and BD.

Purpose of the Study:

• To investigate if dissociative symptoms can differentiate between UD and BD.
• To assess the prevalence of dissociative symptoms in active depressive episodes of UD and BD.

Main Methods:

• Thirty-six UD and 35 BD patients in active episodes were recruited.
• Patients were assessed for depressive and dissociative symptoms using the Hamilton Depression Rating Scale and Dissociative Experience Scale-II (DES-II).
• No psychiatric comorbidities were present in the selected patients.

Main Results:

• No significant differences in socio-demographic or clinical variables were found between UD and BD groups.
• The BD group reported significantly higher dissociative experiences than the UD group (U=343, p=0.001).
• This difference remained significant after adjusting for confounding factors.

Conclusions:

• Dissociative symptoms are more prevalent in depressive episodes of BD compared to UD.
• Dissociative symptoms can serve as a valuable tool for differentiating between UD and BD.
• The Dissociative Experience Scale-II (DES-II) is a suitable instrument for measuring this difference.