Clinical features associated with trait-impulsiveness in euthymic bipolar disorder patients.

Area of Science:

• Psychiatry
• Clinical Psychology
• Neuroscience

Background:

• Trait-impulsiveness is strongly associated with bipolar disorder (BD).
• Previous subgroup analyses on this association have yielded conflicting results.
• The role of trait-impulsiveness in suicidal behavior and substance misuse in BD patients remains unclear.

Purpose of the Study:

• To compare impulsiveness levels between euthymic bipolar patients and healthy controls.
• To investigate the association between impulsiveness and clinical characteristics in bipolar disorder.
• Specifically examining suicide attempts, substance misuse, rapid cycling, and mixed episodes.

Main Methods:

• Utilized the Barratt Impulsiveness Scale-10 (BIS-10) for assessment.
• Compared BIS-10 scores between 385 euthymic bipolar patients and 185 healthy controls.
• Correlated impulsiveness scores with history of suicide attempts, alcohol/cannabis misuse, rapid cycling, and mixed episodes.

Main Results:

• Bipolar patients exhibited significantly higher BIS-10 scores across all subscales compared to controls (p < 0.0001).
• Impulsiveness was associated with alcohol and cannabis misuse, and with rapid cycling and mixed episodes, showing additive effects.
• No significant association was found between impulsiveness and suicide attempt characteristics (history, number, age, violence).

Conclusions:

• Trait-impulsiveness is a dimensional feature associated with a more severe clinical presentation of bipolar disorder.
• Substance misuse, rapid cycling, and mixed episodes are linked to higher trait-impulsiveness in BD.
• Impulsiveness was not associated with suicidal behavior characteristics in this bipolar patient cohort.