Depression and bulimia: the link between depression and bulimic cognitions

This study assessed the link between bulimic and depressive cognitions. Twenty-nine bulimics and 16 controls from the general population were first assessed on levels of depression using the Schedule for Affective Disorders and Schizophrenia-Change Version and the Beck Depression Inventory (BDI). Bulimics were significantly more depressed than controls. Bulimics differed significantly from controls on all cognitive measures associated with depression (Automatic Thoughts Questionnaire, Dysfunctional Attitude Scale, and Attributional Style Questionnaire), but differences on these measures were nonsignificant when depression, as measured by the BDI, was controlled. Bulimics differed from controls regardless of level of depression on the three scales of the Restraint Inventory, the Rationalization and All-or-None scales of the Thoughts About Eating Inventory, and most of the eight scales of the Eating Disorders Inventory. Bulimics showed more maladaptive thinking associated with depression, but these differences likely reflect the levels of depression for each group. The differences on the measures of cognitive and behavioral symptoms of bulimia remained when the level of depression was controlled statistically. This suggests that although depression can be frequently diagnosed in a bulimic sample, specific maladaptive cognitions and behaviors reflect a distinct disorder (bulimia) and are not simply the expression of an affective disorder.