Urinary free cortisol levels and dexamethasone suppression testing in organic affective disorder associated with hyperthyroidism
Abstract
Eleven of 32 newly diagnosed untreated patients with hyperthyroidism met DSM-III criteria for organic affective syndrome. Thirty of these patients submitted 24-hour urine specimens for measurement of urinary free cortisol levels, and 31 were given a 1-mg dexamethasone suppression test (DST) before antihyperthyroidism therapy was started. There was no difference in the mean +/- SD urinary free cortisol excretion levels between depressed and nondepressed hyperthyroid patients. One nondepressed patient demonstrated nonsuppression (greater than 5 micrograms/dl) at 8:00 a.m. These results suggest that cortisol abnormalities as reflected by urinary free cortisol levels and DST findings are uncommon in patients with hyperthyroidism whether they are depressed or nondepressed.
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