A comparative study on dual patients with affective disorder.

Area of Science:

• Psychiatry
• Addiction Medicine
• Clinical Psychology

Background:

• Dual diagnosis, characterized by co-occurring mental health and substance use disorders, is under-researched regarding substance-specific differences.
• Understanding these differences is crucial for targeted treatment strategies in affective disorders.

Purpose of the Study:

• To investigate variations among dual patients with affective disorders based on the type of substance abused.
• To compare dual diagnosis patients with non-dual patients regarding substance abuse patterns.

Main Methods:

• A retrospective chart review was conducted on 94 dual and 94 matched non-dual patients with affective disorders.
• Data on substance abuse were compared between dual and non-dual groups, and within subgroups of dual patients.

Main Results:

• Dual patients constituted 17.4% of all patients with affective disorders, with equal proportions across unipolar, bipolar, and dysthymia diagnoses.
• Significant differences emerged when dual patients were categorized by substance: alcohol (59%), opioids/cocaine (22%), and sedatives/hypnotics (19%).
• Patients abusing illegal drugs were younger, exhibited more behavioral pathology, and all substance abuse groups differed in the onset of their affective illness.

Conclusions:

• Distinct differences exist between dual patients with affective disorders who abuse different substances.
• The choice of substance of abuse appears significantly influenced by the age of onset of the primary affective disorder.