The Dexamethasone Suppression Test in Elderly, Non-Depressed Patients with Dementia

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Abstract
Attempts have been made to use the dexamethasone suppression test (DST) to distinguish patients who have a primary depressive disorder from those suffering a degenerative cerebral disorder. It has been suggested however, that organic brain damage reduces neuroendocrine sensitivity and can be associated with failure to suppress on the DST. This study investigates the DST in 21 patients, over 65 years, with dementia but no evidence of depression on a variety of clinical criteria. Seven patients had abnormal DSTs.