Mood, Activity, and Instability in Bipolar Disorder and Unipolar Disorder-An Exploratory Post Hoc Study Using Digital...

Area of Science:

• Psychiatry and Behavioral Sciences
• Clinical Psychology
• Neuroscience

Background:

• Mood, activity, and symptom instability are key features in bipolar disorder (BD) and unipolar disorder (UD).
• Understanding symptom differences is crucial for accurate diagnosis and treatment of mood disorders.
• Previous research highlights the importance of these symptoms in differentiating mood disorders.

Purpose of the Study:

• To investigate and compare the specific symptoms of mood, activity, and instability between patients diagnosed with BD and UD.
• To identify potential differences in daily mood and activity patterns that may distinguish these two patient groups.

Main Methods:

• Combined data from two studies involving patients with BD and UD for exploratory analysis.
• Utilized smartphone-based daily assessments of mood and activity/energy over a 6-month period.
• Calculated mood and activity instability using the root squared successive difference method on over 13,000 patient evaluations.

Main Results:

• Patients with BD exhibited significantly lower overall activity levels compared to patients with UD, even during euthymic and depressive states.
• No statistically significant differences were found in mood instability between BD and UD patients.
• Activity instability also showed no significant differences between the BD and UD groups after accounting for multiple testing.

Conclusions:

• Patients with BD demonstrate reduced activity levels when compared to patients with UD.
• Mood and activity instability do not appear to be distinguishing factors between BD and UD in this cohort.
• Further research with larger sample sizes is recommended to validate these findings and explore inter-group differences.