Eating behaviours- society, diet, wight and the psyche Flashcards
LO’s
What drives societal norms to diet
describe factors driving population weight gain
be aware of treatmentd for obesity
complications of obesity
define eating disorders
drivers of ewating disorders
framework to manage
Societal effects on eating
- hunter- gratherer background, evolved to feast and famine (cling onto excess food)
- humans have always eaten as a group
develops societal bonds
periods of famine reinforce “more = good”
transition to sedentary lifestyle + easier access to more and fattier foods
BMI quantifying weight ranges
BMI= weight(kg)/ height
underweight= <18.5
healthy= 18.5- 24.9
overweight= 25- 29.9
obese= 30+
extremely obese= 35+
Psychological burden of obesity
not easy to treat for an individual
stigmatising
5x more likely to have major depression
1/3 depressed at time of bariatric surgery
decrased QoL
low self esteem
suicidal ideation
Obesity complications
psychological
metabolic syndrome (CVD, diabetes, Hypertension, NAFLD)
cancer
reduced life expectancy
obesity management
diets
exercise
boot camps
drugs
surgery
government policy/ education
treat associated morbidity
Obesity surgeries (2)
gastric bypass
gstric band
Classifications of eating disorders
anorexia nervosa
bulimia nervosa
binge eating disorder
OSFED (other specified feeding or eating disorder)
typical patient for eating disorder
BMI < 17.5
weight loss is seen as positive
reinforcing
exercise to excess
amenorrhea (loss of menstrual period)
16-17 onset
Bulimia nervosa
binge eating
Compensatory behaviour (exercise, vomiting, laxatives, thyroxine)
slightly older than AN 18-19
Binge eating disorder
large food intake over <2hours (loss of control) (eats alone) (no compensatory acts)
embarrassed and negative feelings
Aetiology of eating disorders
genetic
pshyical (pre-morbid obesity)
adverse life effects
family factors
socio-cultural
perfectionism
impulsivity
how high do eating disorders rank in terms of suicide amongst psychiatric conditions
top
General pathology of refeeding syndrome
reintroduce glucose
rush of serum insulin
massive influx of potassium and ohosphate into cells
serum levels then drop
heart attack
Physical risks of eating disorders
starvation (high risk <13 BMI)
refeeding syndrome
hypoglycaemia
electrolyte disturbance
ECG abnormalities
sepsis
death