Eating disorders

Question 1

BMI required for a diagnosis of anorexia nervosa in ICD 10

Answer 1

17.5

Question 2

BMI required for a diagnosis of anorexia nervosa in ICD 11

Answer 2

18.5 OR weight loss of more than 20% body weight in 6 months in adults
BMI for age under 5th centile in children and adolescents

Question 3

Required features for a diagnosis of anorexia nervosa in ICD 11

Answer 3

Significantly low body weight not better accounted for by another medical condition or the lack of availability of food
Pattern of restrictive eating or behaviours aimed to reduce weight - can include purging
Excessive preoccupation with body weight and shape

Question 4

Definition of amenorrhoea in ICD 11

Answer 4

Absence of menstruation by age 16 or termination of an established menstrual cycle for more than 3 months

Question 5

Features of atypical anorexia - diagnosis in ICD 10 which is no longer in ICD 11

Answer 5

Some features of anorexia nervosa are fulfilled but one key symptom may be absent

Question 6

Features seen in patients with atypical anorexia nervosa

Answer 6

Older age
Recurrent depressive episodes
Less evidence of body image distortion
Somatic complaints

Question 7

Physical disorders that can be differential diagnoses for anorexia nervosa

Answer 7

Malignancy
Chronic infection
Hyperthyroidism
GI disorders that may result in vomiting, loss of appetite or malabsorption

Question 8

Psychiatric disorders that may be differential diagnoses for anorexia nervosa

Answer 8

Depression
OCD
Vomiting due to conversion disorder
AFID
Delusions around food

Question 9

Requirements for a diagnosis of bulimia nervosa in ICD 11

Answer 9

Frequent recurrent episodes of binge eating at least once a week over a month
Repeated inappropriate compensatory behaviours to avoid weight gain - same time frame
Excessive preoccupation with body weight or shape
Distress about the pattern of binge eating and compensatory behaviours
Does not meet requirements for anorexia nervosa

Question 10

Two types of bulimia nervosa seen in DSM IV

Answer 10

Purging and non-purging

Question 11

Category binge eating disorder falls under in ICD 10

Answer 11

Atypical bulimia

Question 12

Concordance rate of anorexia nervosa in monozygotic twins

Answer 12

55%

Question 13

Concordance rate for anorexia nervosa in dizygotic twins

Answer 13

5%

Question 14

Eating disorder associated with polycystic ovarian syndrome

Answer 14

Bulimia nervosa

Question 15

Risk factors for developing anorexia nervosa

Answer 15

Female sex
Class - largely similar across socioeconomic groups but upper/middle class patients more likely to present
Culture - models, ballerinas etc.
Dietary problems in early life
Parental preoccupation with dieting
Weak or overly rigid boundaries within the family
Perfectionist personality traits

Question 16

Female:male ratio for anorexia nervosa

Answer 16

10:1

Question 17

Eating disorder associated with parotitis

Answer 17

Bulimia nervosa