Comparative Dexamethasone Suppression Test Measurements in Bulimia,Depression and Normal Controls

Abstract

Twenty bulimics, 20 depressives and 20 normal controls were studied using the Dexamethasone Suppression Test (DST) as defined by Carroll et al. Their past psychiatric and family histories were compared. We found that actively bulimic subjects had a rate of DST non-suppression of 20%, and that 20% of them had a past history of a major depressive disorder. Forty per cent had a history of alcoholism and I or antisocial personality in a first degree relative, but only 5% had a positive family history of affective disorder. These rates were significantly lower than those found in the depressed group except for the family history of alcoholism and/or antisocial personality for which there was no significant difference. We identified a subgroup of bulimic DST non-suppressors who, like patients with melancholia, were characterized by past history of major depressive illness and high rates of family history of affective disorder, alcoholism and/or antisocial personality in first degree relatives. This group responded to antidepressant medications in a manner similar to depressed patients.