Eating Disorder

BY : Wu Yingxin Xiang Zheng Yang Hong 1

Eating Disorder

By: Wu Yingxin Xiang Zheng Yang Hong

Eating Disorder

Structure


Other psychiatric

disorder

Eating Disorder

Background

• Definition: severe disturbances in eating behavior• Prevalence: point-0.28% lifetime-0.5%• High risk in: teenage and early adulthood• female• developed countries• Trend: age => younger• culture => developing countries• Typical type: AN & BN


Eating Disorder

Anorexia nervosa is a kind of eating disorder that the individual refuses to maintain a normal weight because of fear of becoming fat. It leads to severe somatic problems.


Eating Disorder


High risk

Occupation GroupBallet dancersActressesModelsgymnasts

White women in western countries

Prevalence (Life-time) Women:0.5% Men:0.05%

Peak Age 14-19

Eating Disorder

Criteria

A 85% less than the normal weight(self-induced).

B Intense fear of gaining weight or becoming fat.

C Distorted experience and significance of body weight and shape.

D Female: Amenorrhea(闭经 ) at least(≥ ) 3 months. BY : Wu Yingxin Xiang Zheng Yang Hong 6

Eating Disorder

Other symptoms

• They are proud of their weight loss• Efforts may be made to conceal their thinness • Body image disorder• Medical complications• Low mood(depression)


Eating Disorder

Subtypes

Restricting type• Restricted diet• Excessive exercise• Often try to avoid eating in

the presence of other people

• At the table, may eat excessively slowly and cut the food into pieces, or even secretly dispose of it

Binge-eating/purging type

• Either or both of the behaviors occur

• A breakdown of restraint that results in periods of binge-eating

• Out-of-control binge-eating • Followed by efforts to purge

How patients maintain their very low weight

Transition(30%~50%

)


Eating Disorder

BULIMIA NERVOSA( B N )

Definition: Bulimia Nervosa involves binge

eating followed by compensatory behavior to rid the body of what has just been consumed.

9BY : Wu Yingxin Xiang Zheng Yang Hong

Eating Disorder

Criteria• A. Recurring binge eating – excessive quantities

consumed within a discrete period of time without a sense of control over what or how much is consumed

• B. Recurring inappropriate weight gain – such as self –induced vomiting , misuse of laxatives , or fasting.

• C. Binge eating and compensatory behaviors occur on average at least twice a week for the three months.

• D. self-evaluation is excessively influenced by body shape and weight.


Eating Disorder

Prevalence

Around 1-3% of females in adolescence to early adulthood


Eating Disorder

SubtypesPurging Type

This subtype describes

presentations in which the person has regularly engaged in self-induced vomiting or the misuse of laxatives , diuretics, or enemas during the current episode.

Nonpurging Type This subtype describes

presentations in which the person has used other inappropriate compensatory behaviors, such as fasting or excessive exercise, but has not regularly engaged in self-induced vomiting or the misuse of laxatives, diuretics, or enemas during the current episode.


Eating Disorder


AN: Binge-Purging Type

Eating Disorder


Relation with other disorders

Eating Disorder

Difference with other disorders

• Severe somatic damage

• Cultural Difference: Developed > DevelopingBY : Wu Yingxin Xiang Zheng Yang Hong 15

Eating Disorder

Interaction – Case Study

• Group discussion

• Case study


Eating Disorder

Welcome questions!!


Eating Disorder

Type ANRestricting type

ANBinge/purge type

BNPurging type

BNNonpurging type

Weight < 85% of normal < 85% Normal Normal

Binge(暴食 )

No Yes Yes No

Compensatory behavior

No Yes after binge Yes Yes

Amenorrhea(闭经 )

Yes Yes Not always Not always


What’s the difference between AN and BN

BACK

Health & Medicine

Eating Disorder