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Hypothalamic-pituitary-adrenocortical activity and response to cognitive behavior therapy in unmedicated, hospitalized depressed patients
Am J Psychiatry 1996;153:886-891.
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Abstract

OBJECTIVE: Surprisingly little research supports the hypothesis that depressions characterized by objective measures of neurobiological dysregulation respond poorly to psychotherapy. Moreover, relevant studies testing this hypothesis have been compromised by low rates of neurobiological abnormality in outpatient samples. The authors therefore investigated response to cognitive behavior therapy in relation to pretreatment measures of hypothalamic-pituitary- adrenocortical (HPA) activity in hospitalized, yet unmedicated, patients. METHOD: The subjects were 29 unmedicated, hospitalized patients with major depression (DSM-III-R and Schedule for Affective Disorders and Schizophrenia/Research Diagnostic Criteria), nonpsychotic/nonbipolar subtype. After a 7- to 14-day evaluation, urinary free cortisol levels and dexamethasone suppression tests (DSTs) were obtained. Patients were treated for an average of 3 weeks with intensive individual cognitive behavior therapy. Response was assessed in relation to clinical severity of illness and pretreatment HPA parameters. RESULTS: Response to inpatient cognitive behavior therapy was inversely associated with pretreatment urinary free cortisol concentrations, although not strongly correlated with DST results. Overall, 12 (92%) of 13 cortisol suppressors on the DST who had normal urinary free cortisol concentrations responded to treatment, compared with only seven (44%) of the 16 patients characterized by nonsuppression of cortisol and/or elevated urinary free cortisol excretion. The relation between response to cognitive behavior therapy and HPA activity was not explained by clinical measures of symptom severity. CONCLUSIONS: Results are consistent with the hypothesis that patients with increased HPA function are less responsive to psychotherapy and, hence, might require somatic interventions. It is proposed that the negative impact of hypercortisolism on neurocognitive function mediates this relationship.

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