What factor most increases the risk of developing an eating disorder in a 14-year-old boy with a history of significant weight loss, who is a vegetarian and participates in cross-country sports, and has a past history of being overweight?

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From the Guidelines

The patient's dysmorphic body image is the most significant risk factor for developing his current condition, as it drives his restrictive eating behaviors and persistent drive for weight loss. This patient's history reveals several concerning signs of an eating disorder, with his dysmorphic body image being the most significant risk factor. Despite having lost a substantial amount of weight (10 kg over 9 months), he remains preoccupied with "not getting fat again" and views his previous weight negatively. His perception that he "used to be fat" and that this prevented him from making friends demonstrates a distorted body image that is driving his restrictive eating behaviors, including becoming vegetarian and decreasing portion sizes. According to the study by 1, body image dissatisfaction in male and female athletes is a risk factor for disordered eating or eating disorders, irrespective of the perceived weight-related performance pressures of their sport. This suggests that the patient's dysmorphic body image is a primary psychological factor that most increased his risk for developing an eating disorder. Some key points to consider include:

  • The patient's significant weight loss (10 kg over 9 months) and his desire to continue losing weight
  • His distorted body image, as evidenced by his perception that he "used to be fat" and his negative view of his previous weight
  • The potential contribution of other factors, such as sports participation, dietary changes, and social isolation, to his condition However, as stated in the study by 1, the pathogenesis of eating disorders is multifactorial, and factors specific to sport, such as dieting to enhance performance and pressure to lose weight, may also play a role. Overall, the patient's dysmorphic body image is the most significant risk factor for developing his current condition, and it is essential to address this issue to prevent further complications.

From the Research

Risk Factors for Developing Eating Disorders

The patient's history reveals several factors that could contribute to the development of eating disorders. The key factors to consider are:

  • History of being overweight and subsequent significant weight loss
  • Adoption of a vegetarian diet and reduction in meal portions
  • Participation in sports, particularly cross-country, which may promote a culture of thinness and high physical demands
  • Social factors, such as having few friends and receiving compliments on weight loss, which can influence body image and eating behaviors

Most Significant Risk Factor

Based on the provided evidence, the most significant risk factor for developing eating disorders in this patient's history is:

  • Dysmorphic body image, which is closely related to the patient's history of being overweight and his desire not to "get fat again" 2. This concern, coupled with the significant weight loss and the adoption of a vegetarian diet with reduced portions, suggests a potential preoccupation with weight and body shape.

Other Considerations

Other factors, such as the adoption of a vegetarian diet 3, participation in sports 3, and having few friends, may also play a role in the patient's risk for developing eating disorders. However, these factors are less directly related to the core issues of body image and eating behaviors. The patient's history of high percentile for weight is also relevant, as individuals who have been overweight are at higher risk for developing eating disorders, particularly those characterized by restrictive eating patterns 4.

Relevant Studies

Studies have shown that abnormal eating patterns and body image concerns are central to the development of eating disorders 5, 2. Additionally, dietary restrictions, such as those associated with vegetarian diets, can increase the risk of nutritional deficiencies and disordered eating 6. Healthcare providers should be aware of these risks and provide guidance on healthy eating habits and body image to prevent the development of eating disorders 3, 2.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Eating disorders.

Lancet (London, England), 2020

Research

Preventing Nutritional Disorders in Adolescents by Encouraging a Healthy Relationship With Food.

The Journal of adolescent health : official publication of the Society for Adolescent Medicine, 2020

Research

Nutritional management of eating disorders.

The Psychiatric clinics of North America, 1996

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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