Anorexia Nervosa: Clinical Features and Treatment for Counseling Practice

Understanding Anorexia Nervosa

Anorexia Nervosa (AN) is a serious eating disorder characterized by restriction of energy intake, intense fear of gaining weight, and disturbance in body image perception. AN has the highest mortality rate of any mental disorder, with death resulting from medical complications or suicide. The disorder most commonly affects adolescent girls and young women, though it can occur in any age, gender, or demographic group. Lifetime prevalence is approximately 0.9% for women and 0.3% for men.

DSM-5-TR Diagnostic Criteria

1. Restriction of energy intake relative to requirements, leading to a significantly low body weight in the context of age, sex, developmental trajectory, and physical health
2. Intense fear of gaining weight or of becoming fat, or persistent behavior that interferes with weight gain, even though at a significantly low weight
3. Disturbance in the way one's body weight or shape is experienced, undue influence of body weight or shape on self-evaluation, or persistent lack of recognition of the seriousness of the current low body weight

Subtypes

The restricting type involves weight loss accomplished primarily through dieting, fasting, or excessive exercise without binge-eating or purging. The binge-eating/purging type involves recurrent episodes of binge eating or purging behavior (self-induced vomiting, misuse of laxatives, diuretics, or enemas) during the current episode of anorexia nervosa.

Medical Complications

Counselors must be aware of the serious medical complications associated with AN. Cardiovascular complications include bradycardia, hypotension, and cardiac arrhythmias. Endocrine effects include amenorrhea, osteoporosis, and thyroid abnormalities. Gastrointestinal complications include constipation, gastroparesis, and elevated liver enzymes. Metabolic disturbances include electrolyte imbalances that can be life-threatening. Refeeding syndrome, a potentially fatal condition that can occur when nutrition is restored too rapidly, is a critical concern during the early stages of treatment.

Etiology

AN has a multifactorial etiology. Genetic factors contribute significantly, with heritability estimates of 50 to 80%. Psychological factors include perfectionism, low self-esteem, anxiety, obsessive-compulsive traits, and difficulty with emotional regulation. Sociocultural factors include exposure to thin-ideal media, weight stigma, and cultural emphasis on appearance. Family factors may include enmeshment, overprotectiveness, and conflict avoidance, though contemporary understanding avoids blaming families and instead recognizes their essential role in treatment.

Evidence-Based Treatments

Family-Based Treatment (FBT)

FBT, also known as the Maudsley approach, is the leading evidence-based treatment for adolescents with AN. In Phase 1, parents take charge of refeeding their child. In Phase 2, control over eating is gradually returned to the adolescent. In Phase 3, the focus shifts to normal adolescent development. FBT externalizes the eating disorder and empowers parents as active agents of change.

CBT-Enhanced (CBT-E)

CBT-E, developed by Christopher Fairburn, is an evidence-based transdiagnostic treatment for eating disorders in adults. It addresses the cognitive and behavioral maintenance factors of the eating disorder, including dietary restriction, overvaluation of shape and weight, and clinical perfectionism.

Other Approaches

Specialist Supportive Clinical Management (SSCM) combines clinical management with supportive therapy. Adolescent-focused therapy (AFT) is an individual approach that targets developmental issues. Medical stabilization and nutritional rehabilitation must proceed alongside psychotherapy.

Counselor Considerations

Working with clients who have AN requires a multidisciplinary team approach including a physician, dietitian, and mental health professional. Counselors should monitor for medical instability and refer for medical evaluation when indicated. Building a therapeutic alliance can be challenging, as many clients with AN are ambivalent about recovery or actively resistant to weight gain. Motivational interviewing techniques can help address ambivalence. Counselors must also be aware of their own potential biases about weight and body size.

Exam Tips

• AN has the highest mortality rate of any mental disorder
• The DSM-5 removed the amenorrhea requirement that existed in the DSM-IV
• Know the two subtypes: restricting and binge-eating/purging
• FBT (Maudsley approach) is the first-line treatment for adolescents
• CBT-E is the leading evidence-based treatment for adults with eating disorders
• Refeeding syndrome is a life-threatening complication of nutritional rehabilitation