Anorexia Nervosa in Adolescent Girls

Epidemiology and Gender Disparity

Anorexia nervosa affects greater than 90% females, with a female-to-male ratio of approximately 9:1 2, 3
The lifetime prevalence in adolescent females is approximately 0.3%, with peak onset occurring in early to mid-adolescence 3
The disorder primarily affects young women between ages 13-20 years, and the incidence has increased in recent decades 1

The emphasis of Western society on thinness creates disproportionate pressure on adolescent girls, who internalize these unrealistic body ideals 2, 4
Girls as young as 9 years old have been reported engaging in harmful weight loss practices, demonstrating how early these societal pressures take effect 2, 4
Adolescent girls involved in competitive sports and dancing face particularly high risk for unsafe weight control practices due to performance pressures combined with aesthetic expectations 2, 4

Adolescents who develop eating disorders characteristically exhibit lower self-esteem, negative body image, and feelings of inadequacy, anxiety, social dysfunction, depression, and moodiness compared to peers with normal eating patterns 1, 2, 4
The disorder is characterized by distorted self-perception of body image and excessive fear of gaining weight, with self-worth becoming overly based on body shape and weight 5

Dieting is the single most important predictor of developing an eating disorder in adolescent girls 5
Girls who dieted were 18 times more likely to develop an eating disorder than non-dieters, while those who dieted at moderate levels had a fivefold increased risk 5
The rate of smoking initiation is higher for adolescent girls who diet or are concerned about their weight, as many use smoking to control appetite and weight 2, 4

Mortality rates for eating disorders are among the highest for any psychiatric disorder, with cardiac complications responsible for at least one-third of all deaths 1, 2, 3
Early detection and immediate medical and psychological treatment are critical, as complications develop rapidly in malnourished adolescents 1, 2, 6

Do not assume normal laboratory results exclude serious illness—more than half of adolescents with eating disorders have normal test results despite being medically unstable 6