SLIDE 14 Anorexia Nervosa (AN)
Primarily affects adolescent girls and young women
n
excessive dieting leads to severe weight loss
n
pathological fear of gaining weight or becoming fat; interferes with weight gain
n
characterized by distorted body image
Bulimia Nervosa (BN)
n
Recurrent episodes of binge eating; characterized by:
u Eating, in a discrete
period of tim e (e.g. within any 2-hour period), an am ount
larger than most people would eat
u A sense of lack of
control over eating during the episode
n
Recurrent inappropriate com pensatory behavior, such as self- induced vomiting, misuse of laxatives, diuretics, or other medications, fasting, or excessive exercise.
n
The binge eating and behaviors both occur,
- n average, at least
- nce a w eek for three
m onths.
n
Self-evaluation is unduly influenced by body shape and weight.
Binge Eating Disorder (BED)
n
Recurring episodes of eating significantly more food in a short period of time than most people would eat under similar circumstances
u episodes marked by
feelings of lack of control
n
Associated with marked distress
n
Occurs, on average, at least once a week over three months.
n
These episodes associated with ≥ 3:
u eating much more
rapidly than normal
u eating until feeling
uncomfortably full
u eating large amounts of
food when not feeling physically hungry
u eating alone because of
feeling embarrassed by how much one is eating
u feeling disgusted with
very guilty afterward
uNOT associated with purging, fasting, excessive
exercising, or laxative
Prevalence in General Population
n
AN: Lifetime prevalence 0.5% to 1%
u The crude mortality rate (CMR) is approximately 5%
per decade
n
BN: Lifetime prevalence 1% to 5%
u The CMR is nearly 2% per decade
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n
Those who engaged in dieting, unhealthy and extrem e w eight control behaviors, and binge eating during adolescence w ere at increased risk 1 0 years later
uNeumark-Sztainer D et al, JADA 2011
