This study compares the family functioning of patients with anorexia nervosa (AN), bulimia nervosa (BN) and obsessive compulsive disorder (OCD). The study participants, who were all female, consisted of 15 patients with AN, 13 with BN, and 17 with OCD. Family functioning was assessed by using the Family Assessment Device self-rating scale. The study subjects also completed the Eating Attitudes Test. Subjects in the AN and BN groups did not differ statistically either from each other or from the OCD group in all 7 Family Assessment Device subscales. Patients with an eating disorder and OCD rated their family functioning in a similar way. It is difficult to conclude that patients with AN or BN have a specific type of family functioning, which is totally different from the family functioning of patients with OCD. Thus, the study results further support the idea that family interaction in eating disorders is not specific to these disorders, especially when compared with patients with OCD. (c) 2007 Elsevier Inc. All rights reserved.