Orthorexia among patients with eating disorders, student dietitians and general population: a pilot study

Orthorexia is a recent construct describing an unhealthy and extreme concern for healthy food. To date, its relationship with other eating disorders (EDs) remains unclear, and little is known about the development of this condition. Current literature suggests that a thorough knowledge about nutrition and alimentation, as in the case of experts in the field of dietetics, could foster the development of orthorexic tendencies. The aim of this study was to compare orthorexia between ED patients, student dietitians and general population.

A total of 90 female participants (age: 18-29 years) were recruited: 30 ED patients, 30 student dietitians and 30 control subjects, matched for age and sex. Orthorexia, ED-specific and general psychopathology were evaluated using self-report questionnaires (ORTO-15, Eating Disorder Examination Questionnaire and Symptom Checklist-90-Revised).

Eating disorder patients had significantly higher orthorexic tendencies than other groups (p < 0.001), while student dietitians and general population showed no difference between each other (p = 0.96). Moreover, orthorexia positively correlated to ED psychopathology in ED patients (p = 0.004), but not in control groups.

Our data do not confirm previous suggestions that experts in the field of dietetics may display a higher level of orthorexia.

Level IV, cross-sectional observational study (case series).