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Patients excluded from an antidepressant efficacy trial
T Partonen1, S Sihvo, J K Lönnqvist
1Department of Mental Health, National Public Health Institute, Helsinki, Finland.
The Journal of Clinical Psychiatry
|December 1, 1996
Summary
Exclusion criteria in antidepressant trials disproportionately exclude patients with prior depression or comorbid conditions. This limits data on antidepressant efficacy in these complex patient groups.
Area of Science:
- Psychiatry
- Clinical Psychology
- Pharmacology
Background:
- Antidepressant trial exclusion criteria impact generalizability.
- Understanding patient selection in clinical trials is crucial.
Purpose of the Study:
- Analyze reasons for exclusion in a double-blind antidepressant trial.
- Assess the impact of selection on treatment outcomes.
Main Methods:
- 6-week randomized double-blind trial for depressive disorders.
- Recruitment from diverse outpatient psychiatric services.
- Diagnosis according to DSM-III-R criteria.
Main Results:
- Only 34% of interviewed patients entered the trial.
- Exclusion common for substance misuse, concurrent medications, or physical issues.
- Excluded patients had higher rates of comorbid disorders and prior depressive episodes.
Conclusions:
- Antidepressant trials often exclude vulnerable populations.
- Limited data exists on antidepressant efficacy for patients with prior episodes or comorbidities.