Table 1

Eating disorder classifications

ICD-11essential features only	DSM-V official features
Anorexia nervosa Significantly low weight (BMI <18.5 kg/m²)/rapid weight loss Persistent attempt to create calorie deficit Overvalued low body weight	Anorexia nervosa Significantly low weight and persistent attempt to create calorie deficit Intense fear of weight gain Disturbance of own body image perception
Bulimia nervosa Frequent binge eating episodes (once a week for at least a month) Repeat inappropriate compensatory behaviours to prevent weight gain (once a week for at least a month) Distress around bingeing/compensation Not meeting anorexia nervosa definition	Bulimia nervosa Frequent binge eating episodes (around once a week for 3 months) Repeat inappropriate compensatory behaviours to prevent weight gain Unduly influenced by body image Bingeing not exclusively during anorexia nervosa
Binge eating disorder Frequent binge eating episodes (once a week for at least 3 months) No regular compensatory behaviours to prevent weight gain No medical/other mental health explanation binges Distress around bingeing	Binge eating disorder Frequent binge eating episodes (at least once a week for 3 months) Binges involve three or more of: eating rapidly/eating until uncomfortably full/eating large amounts when not hungry/eating alone due to embarrassment over volume of consumption/feeling disgusted, depressed or guilty afterwards Distress around bingeing No regular compensatory behaviours to prevent weight gain
Avoidant-restrictive food intake disorder Avoidance/restriction of intake leading to one or both of: significant nutritional consequences/negative social consequences Eating pattern unrelated to body image preoccupation Unavailability of food/another illness is not a causal factor	Avoidant-restrictive food intake disorder Avoidance/restriction of intake leading to one or more of: nutritional deficiency/weight loss/need for alternative feeding routes/negative social consequences Unavailability of food/cultural or social norm is not a causal factor Not exclusively as part of another eating disorder or with body image issues If another medical/mental health condition considered related, symptoms sufficiently severe to warrant specific attention
	Unspecified feeding or eating disorder Characteristics of eating disorders however not fully fitting the diagnostic labels

BMI, body mass index; DSM-V, Diagnostic and Statistical Manual of Mental Disorders-5; ICD, International Classification of Diseases.