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Pharmacologic Treatment of Anxiety Disorders in 1989 Versus 1996: Results From the Harvard/Brown Anxiety Disorders Research Program

J Clin Psychiatry 2001;62:149-152

Objective: This article reports on the pharmacologic treatment of patients diagnosed with generalized anxiety disorder (GAD) enrolled in a naturalistic long-term study of anxiety disorders, with enrollment in 1989 through 1991 and follow-up in 1996.

Method: 711 patients were enrolled in the study during 1989-1991. At intake, 167 patients met DSM-III-R criteria for GAD; at 1996 follow-up, 103 patients met these criteria. The patients were divided into 3 groups by diagnosis: GAD alone (N = 18 at intake, N = 11 at follow-up), GAD comorbid with another anxiety disorder (N = 84 at intake, N = 52 at follow-up), and GAD comorbid with Research Diagnostic Criteria-defined major depressive disorder, with or without another anxiety disorder (N = 65 at intake, N = 40 at follow-up). The groups were evaluated at intake and follow-up on whether they received medication and the types of medication they received.

Results: Nearly one third of patients in the 1989-1991 sample were not receiving any medication for treatment of their anxiety disorder; in 1996, 27% of patients still were receiving no medication. There was a decrease in benzodiazepine treatment and an increase in antidepressant treatment in 1996 for GAD patients who did not have comorbid depression or another anxiety disorder.

Conclusion: The finding of one quarter to one third of patients with GAD receiving no medication is consistent with previous observations of undertreatment of depression. The findings on medication type suggest a shift in the type of medications being prescribed for treatment of GAD from exclusive benzodiazepine treatment to the combination of benzodiazepine and antidepressant treatment.