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lüll Validity and utility of subtyping anorexia nervosa Peat C; Mitchell JE; Hoek HW; Wonderlich SAInt J Eat Disord 2009[Nov]; 42 (7): 590-4OBJECTIVE: The purpose of this article is to review the available literature that addresses the predictive validity and utility of subtyping patients with anorexia nervosa (AN) into binge/purge and restrictor subtypes. METHOD: Literature was reviewed including studies that compared individuals with subtype diagnoses on clinical and outcome variables as well as more recent research examining the frequency of diagnostic crossover. RESULTS: Several studies found that in general the binge/purge subtype patients have more psychopathology, tend to be older, and tend to have a worse outcome. More recent studies which have examined diagnostic crossover suggest that the rate of crossover from the restrictor subtype to the binge/purge subtype is substantial. Crossover from the binge/purge to the restrictor subtype appears to occur less commonly. There is also literature documenting crossover from AN to bulimia nervosa (BN) and a small literature looking at crossover from BN to AN. DISCUSSION: The results of this article suggest that although there is generally progression from restrictor AN to binge/purge AN to BN in a sizeable number of patients, other crossover patterns can be seen as well and the amount of crossover is quite large. This suggests a lack of predictive validity for subtypes.|Anorexia Nervosa/*classification/diagnosis[MESH]|Binge-Eating Disorder/classification/diagnosis[MESH]|Bulimia Nervosa/classification/diagnosis[MESH]|Diagnostic and Statistical Manual of Mental Disorders[MESH]|Humans[MESH]|Reproducibility of Results[MESH] |