Eating Disorders

Eating disorders, as outlined in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition), are characterised by a persistent disturbance of eating or eating-related behaviour that results in the altered consumption or absorption of food and that significantly impairs physical health or psychosocial functioning.

Here are the main types of eating disorders as defined in the DSM-5:

1. Anorexia Nervosa: This disorder is characterised by a restriction of energy intake leading to a significantly low body weight (in the context of age, sex, developmental trajectory, and physical health), intense fear of gaining weight or becoming fat, and a disturbance in the way one’s body weight or shape is experienced.
2. Bulimia Nervosa: Individuals with this disorder engage in recurrent episodes of binge eating (eating an excessive amount of food in a certain period of time accompanied by a sense of lack of control), followed by inappropriate compensatory behaviours such as self-induced vomiting, misuse of laxatives, diuretics, or other medications, fasting, or excessive exercise.
3. Binge-Eating Disorder: This is characterised by recurrent episodes of binge eating without the regular use of inappropriate compensatory behaviours that are seen in bulimia nervosa. These binge-eating episodes are associated with three (or more) of the following: eating much more rapidly than normal, eating until feeling uncomfortably full, eating large amounts of food when not feeling physically hungry, eating alone because of feeling embarrassed by how much one is eating, and feeling disgusted with oneself, depressed, or very guilty afterwards.
4. Avoidant/Restrictive Food Intake Disorder (ARFID): This is characterised by an eating or feeding disturbance (e.g., apparent lack of interest in eating or food; avoidance based on the sensory characteristics of food; concern about aversive consequences of eating) that results in persistent failure to meet appropriate nutritional and/or energy needs.
5. Other Specified Feeding or Eating Disorder (OSFED): This category applies to presentations in which symptoms characteristic of a feeding and eating disorder that cause clinically significant distress or impairment in social, occupational, or other important areas of functioning predominate but do not meet the full criteria for any of the disorders in the feeding and eating disorders diagnostic class.
6. Pica: This disorder involves eating items that are not typically considered food and do not contain significant nutritional value. Common examples include dirt, clay, and laundry starch. It’s often seen in children, pregnant women, and individuals with mental disabilities.
7. Rumination Disorder: This condition is marked by the repeated regurgitation of food after eating. Individuals with this disorder may re-chew, re-swallow, or spit out their food. It’s not due to a medical issue but a behavioural one and can occur at any age.

The psychological analysis of these disorders often involves a complex interplay of biological, psychological, and sociocultural factors. Psychological factors can include issues with body image, low self-esteem, perfectionism, and an intense fear of weight gain. Biological factors may involve genetic predisposition and alterations in brain chemistry. Sociocultural influences can include societal pressures and norms related to body shape and weight, particularly in Western cultures.

Treatment typically involves a combination of psychotherapy, nutritional education, and, in some cases, medication. The primary goal is to help the individual return to a healthy weight, adopt healthy eating habits, and reduce distressing thoughts and behaviours related to eating and body image.

Feeding vs Eating Disorders:

1. Eating Disorders: This category typically includes conditions like anorexia nervosa, bulimia nervosa, and binge-eating disorder. These disorders are more common in teenagers and adults and are often associated with a preoccupation with body image, weight, and control over food intake. Psychological factors, such as stress, self-esteem issues, and mental health disorders, play a significant role in eating disorders.
2. Feeding Disorders: These are more commonly seen in children and include conditions like avoidant/restrictive food intake disorder (ARFID), pica, and rumination disorder. These disorders are not typically driven by concerns about weight or body shape. Instead, they are characterised by a lack of interest in eating or food, avoidance of certain foods due to their sensory characteristics, or the ingestion of non-nutritive substances.