Psychoform and somatoform dissociation in anorexia nervosa (AN) and bulimia nervosa (BN) is yet to be studied in Portugal.

Explore the severity of psychoform and somatoform dissociation in ED; explore the differences between ED and other psychiatric disorders (PD), and between AN and BN.

From two psychiatric clinics, 29 women with ED (AN = 16; BN = 13) and 35 women with different PD (posttraumatic stress = 9; panic = 4; major depression = 4; obsessive-compulsive = 8, social phobia = 10), matched sociodemographicaly (mean age = 26.69 ± 7.31), were voluntarily assessed with the Dissociative Experiences Scale (DES), and the Somatoform Dissociation Questionnaire (SDQ-20).

ED patients had higher scores on DES (M ± SD= 28.10 ±19.76, p < 0.05) and on SDQ-20 (M ± SD= 38.41 ±13.19, p < 0.05) than PD patients (DES: M ± SD= 19.27 ±12.84; SDQ: M ± SD= 38.41 ±13.19). Comparing with PD, BN had higher scores on DES (M ± SD= 31.13 ±21.25, p < 0.05), and on SDQ-20 (M ± SD= 42.45 ±17.36, p < 0.01). Finally, there were no differences between AN (DES: M ± SD= 25.65 ±18.80; SDQ-20: M ± SD= 35.63 ±8.98) and BN (p = 0.01).

Our findings point out to the need to of watchfully assessing ED for dissociative symptoms and, accordingly, include the treatment of dissociation.