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Pre-existing antidepressant medication and the outcome of group cognitive-behavioural therapy
1University of Queensland and Cognitive Behaviour Therapy Unit, Toowong Private Hospital, Australia. oei@psy.uq.edu.au
Objective:
This study aimed to investigate the impact of pre-existing medication on the outcome of group cognitive-behavioural therapy (CBT) in the treatment of patients with depression.
Method:
Of the 71 patients diagnosed with major depression who participated in group CBT, 25 were on medication (CBT-M) and 46 were unmedicated (CBT). The patients received 12 sessions of group CBT over a 3-month period. The dependent measures used were the Beck Depression Inventory, Zung Self-Rating Depression Scale, Automatic Thoughts Questionnaire, Hopelessness Scale, Dysfunctional Attitude Scale, Daily Activity Rating Scale and Daily Mood Rating Scale.
Results:
Both the CBT and CBT-M groups showed statistically significant improvement in depression scores and cognitive process measures. However, the rate of improvement for both groups on these measures did not differ.
Conclusion:
The study indicated that pre-existing antidepressant medication did not enhance or detract from the positive treatment outcome of depressed patients receiving a group CBT treatment.