Lecture 6: Eating Disorders Flashcards
(25 cards)
Anorexia Nervosa DSM V criteria
(1) Restriction of energy intake relative to requirements leading to markedly
low body weight
(2) Fear of weight gain or behaviors to avoid weight gain
(3) Body image disturbance, denial of seriousness of illness, undue influence
of body weight/shape on self-evaluation
(4) No amenorrhea criterion
AN behaviors
(1) Restricting eating/fasting
(2) Exercise
(3) Bingeing
(4) Vomiting
(5) Laxatives/enemas
(6) Diuretics
(7) Diet pills/stimulants
(8) Weighing, shape checking, comparison making
(9) Food rules, calorie counting
AN prevalence
prevalence of 1%, more ED-NOS
AN gender ratio
Female: Male ratio of 1:6 – 1:20
AN peak onset
Peak onset between 15-19 years
AN risk factors
▪ Biological: 33-84% heritability, increased risk w/ a family hx of eating disorders (10x), obesity, or affective disorders
▪ Psychological: comorbid psychiatric diagnoses, concerns about self control, low self esteem, low sense of efficacy, stressed by developmental tasks, early puberty, past history of abuse
▪ Social: food availability and obesity, stigmatization of obesity, media, modeling
Bulimia Nervosa Criteria DSM V
(1) Recurrent binge eating
(2) Recurrent compensatory behaviors to prevent weight gain
(3) On average 1x/wk x 3months
(4) Self evaluation unduly influenced by body shape and weight
(5) Does not occur exclusively during episodes of anorexia nervosa
BN Behaviors
(1) Bingeing
(2) Restricting eating/fasting
(3) Exercise
(4) Vomiting
(5) Laxatives/enemas
(6) Diuretics
(7) Diet pills/stimulants
(8) Weighing, shape checking, comparison making
(9) Food rules, calorie counting
BN prevalence
prevalence of 2-4%, more ED-NOS,
BN gender ratio
Female: Male ratio of 1:6 – 1:20
BN peak onset
Peak onset between 18-23 years
T/F. BN may arise out of AN.
(crossover from 8-62%) usu. in first 5 years
BN risk factors
▪ Biological: 28-83% heritability, increased risk w/ a family hx of eating disorders (10x), obesity, or affective disorders
▪ Psychological: comorbid psychiatric diagnoses, concerns about self control, low self esteem, low sense of efficacy, stressed by developmental tasks, early puberty, past history of abuse
▪ Social: food availability and obesity, stigmatization of obesity, media, modeling
Binge Eating Disorder
o Binging without compensatory behavior
o Associated with overweight/obesity
o More equal gender distribution, more adult onset
Patients at risk for eating disorders
o Overweight, athletes, models, chronic illness (CF, diabetes), history of trauma (type of SIB), psychiatric comorbidity
Look for clues and ask questions, unrecognized by PCP 50% of time!!!!!
ASK!!
IBW
o 100lbs. + 5 lbs. per inch over 5 feet for females
o 106lbs. + 5lbs. per inch over 5 feet for males
criteria for AN (IBW and BMI)
BMI <85%
At what % IBW is mortality increased? inpatient care necessary?
< 65% of IBW increases mortality, <75% for inpatient care
Physical complications of restricting/malnutrition
o Bones: osteopenia, osteoporosis, and fractures
o Brain: pseudo-atrophy with enlarged ventricles, low serotonin
o Cardiac: bradycardia, hypotension, orthostasis, hypothermia, arrhythmias
o Dermatology” lanugo, dry skin, edema;
o GI: constipation, motility;
o Hematology: pancytopenia;
o Endocrine: sick euthyroid syndrome, hypoglycemia, low LH, FSH, estrogen, testosterone
Physical complications of purging:
Electrolyte abnormalities, elevated salivary amylase, arrhythmias, bradycardia, orthostasis, GI tears, GERD, dysmotility, dental enamel loss, parotid swelling
2nd Leading cause of death in AN
Suicidality is the 2nd leading cause of death in AN (16.9% of patients attempt), 8x higher than the general population
Clues for Anorexia Nervosa:
(1) Rapid/severe weight loss
(2) Dieting, calorie counting, taboo foods
(3) Excessive exercise
(4) Focus on body image/appearance
(5) Dizziness, syncope, weakness, cold intolerance, fatigue
Clues for Bulimia Nervosa
(1) Weight cycles
(2) Trips to bathroom after meals
(3) Vomiting, laxatives or enemas
(4) Physical signs and symptoms: Russellʼs sign (knuckle abrasion),
parotid/salivary gland swelling, loss of dental enamel, GERD)
(5) Labs: low K, elevated HCO3
