Eating attitudes in seasonal affective disorder and bulimia nervosa.

Markedly increased appetite and eating are commonly found in seasonal affective disorder (SAD) and bulimia nervosa (BN). To investigate dysfunctional eating attitudes, we administered the Eating Disorders Inventory (EDI), a self-rating questionnaire that assesses abnormal eating attitudes and behaviours, to 30 female SAD patients, 30 matched BN patients, and 30 non-clinical subjects. The SAD patients had higher scores on most EDI subscales compared to the non-clinical subjects; the BN patients had higher scores than the SAD patients on only two of three EDI subscales that are specific to eating disorders. These data add to the evidence supporting a clinical overlap between SAD and BN.