Longstanding underweight eating disorder: associated features and treatment outcome.

The clinical features and the response to inpatient cognitive-behavior treatment (I-CBT) of underweight individuals with either longstanding or more recent-onset eating disorder have rarely been compared. We compared the psychopathological profile and the response to I-CBT of 37 female patients with longstanding eating disorder (≥10 years, L-ED) and 58 with shorter disease duration. Individuals with L-ED had higher age, baseline BMI, higher frequency of self-induced vomiting, laxative and diuretic misuse, but not different personality traits at baseline and not different psychopathological changes, outcome, and dropout rates in response to I-CBT. This study provides preliminary evidence that I-CBT may be useful to treat L-ED and improve their eating disorder psychopathology.