Seasonal fluctuations in mood and eating behavior in bulimia nervosa.

Thirty-five bulimia nervosa (BN) patients with high seasonality scores on a modified version of the Seasonal Pattern Assessment Questionnaire (SPAQ) were administered semistructured clinical interviews to further assess their seasonal symptom patterns. A diversity of patterns were identified, consistent with a multidimensional model of seasonality in the BN population. Overall, the results suggest that seasonality may be an important dimension to consider in patients with BN.