eating disorders - definitions Flashcards
define eating disorder
“a persistent disturbance of eating behaviour or behaviour intended to control weight, which significantly impairs physical health or psychosocial functioning”
issues with the definition of eating disorders (4)
in the eye of the beholder
do models and gymnasts and ballerinas fit this?
* maybe not cos their goal isn’t to become thin but to achieve a sporting goal
not just about weight
gender, age, and ethnicity
younger cases of eating disorders (2)
feeding disorders
avoidant/restrictive food intake disorder
companies which determine what an eating disorder is (2)
DSM-5
ICD - international classification of disease - this follows DSM
incorrect stereotypes of eating disorders
only thin, white, young women
* only 15% with eating disorders are underweight - majority is normal weight
age, gender, and ethnicity doesn’t mean they don’t have an ED
BMI as a measure
* healthy rage
* in young people
* overweight categories
19-25 = healthy range (varies with ethnicity)
BMI is not meaningful in younger people - adjusted for age using expected weight for height:
<85% = underweight
< 70% = dangerously underweight
overweight = BMI > 25
obese = BMI > 30 (more levels within this e.g. morbidly obese > 40)
issues of using BMI with treatments
can be used as a barrier to treatment - only when it is really bad
but many people with ED are healthy weight and so resources aren’t given to them
anorexia nervosa - diagnostic criteria (5)
persistent restriction of energy intake leading to significantly low body weight
* in context of age, sex, developmental trajectory, and physical health
either fear of gaining weight and becoming fat or persistent behaviour that interferes with weight gain
any of these:
* disturbance in way ones body weight or shape is experienced (body dysmorphia)
* undue influence of body shape and weight on self-evaluation
* persistent lack of recognition of seriousness of current low body weight
subtypes of anorexia nervosa (2)
restricting
binge-eating/purging
issues with anorexia nervosa diagnosis (6)
early stages might not be thin enough for intervention
athletes therefore defined as overweight due to muscle weight
ballerinas and gymnasts defined as underweight due to their sport
people differ in set point for weight - so BMI isn’t very useful
definitions related to BMI are arbitrary - they’ve changed over the years
self reported height and weight
difficulty spotting those with anorexia
better at spotting extreme examples
* especially seeing before/after states
* where BMI is lower than 17.5 it is easy to spot
however starvation could be due to other reasons - lack of resources
bulimia nervosa - diagnostic criteria (4)
recurrent episodes of binge eating (eating more than most people would in a discrete period of time under similar circumstances)
* with a lack of control over eating during the episode
recurrent inappropriate compensatory behaviour in order to prevent weight gain
* self-induced vomiting, laxative/diuretics misuse, fasting, excessive exercise
binges and compensatory behaviours occur on average at least once a week for 3 months
self-evaluation is unduly influenced by body shape/weight
* does not occur exclusively during episodes of anorexia nervosa
issues with bulimia nervosa diagnosis (3)
defining what a binge is
* subjective = loss of control
* objective = loss of control + excessive intake
* excessive intake = over 2000kcal in one go
defining compensatory behaviours
* vomiting isn’t always self-induced
* is exercise for health or to control weight
how often do these need to happen
* 1x week for 3 months - but this is ever changing too with new criteria
binge-eating disorder diagnostic criteria
recurrent episodes of binge eating
* eating in a set time period more than most people would under similar circumstances
* lack of control over eating in this episode
episodes have 3 or more of the following:
* more rapid eating
* eating till feeling uncomfortably full
* eating lots when not hungry
* eating alone from embarrassment
* feeling disgusted, depressed, or guilty
marked distress regarding binge eating
at least 1x week for 3 months
no purging/compensatory behaviours
issues with BED diagnosis
recent formal diagnosis - only 2013 with DSM-5 → so still debating levels for diagnosis
need to understand motivation for making this a category in DSM-5
distress and need for treatment
or for insurance money for clinicians as a way to treat lots of obese patients
BED patients can have trouble accessing services - prioritising anorexia over BED, viewed as higher risk - more immediate whilst BED causes premature deaths