Anorexia nervosa 110

Bulimia nervosa 112

Eating disorders are defined as persistent disturbance of eating (± behaviour) that impairs physical health or psychosocial functioning or both and that is not secondary to any other medical or psychiatric disorder.

Anorexia nervosa is a complex disorder described in a number of different ways and recognized for >100 years. It involves voluntary self-starvation, with weight loss, or avoidance of weight gain during adolescence. Peak age of onset is in mid-teens, with a female to male ratio of 10:1, and a prevalence of around 1%. Genetic factors are important, with 55% of monozygotic twins being concordant for anorexia. Sociocultural factors are highly relevant, with the illness occurring predominantly in Western societies where thinness has become increasingly valued as an element of the feminine ideal. Reported mortality rates vary from 0 to 22%....