Prevalence of AN
It is estimated that 1.2-2.2% of females will develop AN over their lifetime. Males also get AN, but less frequently, with approximately 1 in 10 people with AN being male.
The onset of AN tends to occur in mid to late adolescence, or early adulthood. Its course varies, with some recovering after a single episode, others alternating between being ill and well, and people who remain ill for a very long time.
The causes of AN remain unknown. However, psychological, sociocultural and biological factors are thought to contribute to the illness. Psychological risk factors include high perfectionistic traits and obsessive-compulsive behaviours, whereas sociocultural factors include being a white female in an industrialised society.
A number of biological risk factors may also play a role, including a person’s genes and the way their brain functions.
Common symptoms include:
- Severe weight loss
- Dieting behaviours
- Loss of menstruation in females
- Preoccupation with eating, food, or body shape and weight
- Distorted body image
- Low self-esteem
- Depression and anxiety
- Black-and-white thinking
Treatment for AN typically involves family therapy for adolescents, and cognitive behavioural therapy (CBT) for adults. Sometimes people with AN require hospitalisation to help restore their body weight.
Psychological and/or psychiatric treatment is important, and can be administered in an inpatient hospital setting, through a day patient program, as an outpatient, or through private services.