Objective: Orthorexia nervosa (ON) is considered an eating disorder (ED), with an excessive fixation on the consumption of healthy food and an obsession with its biological purity. Since the adolescent period poses a risk for EDs, the aim of this study was to assess the prevalence of ON in a population of Polish urban adolescents and some possible contributory factors.
Method: 1899 high school students, 992 girls and 907 boys aged 15-21 years were studied. Demographic and clinical data were collected using a validated questionnaire including information on preferred living choices, in the context of pro- and antihealth activities. The Polish version of the ORTO-15 questionnaire was used.
Results: The mean value of the ORTO-15 was 39.2 ± 3.6 points, with no sex difference. The main factors connected with orthorexia, according to the 'Orthorexia 33.35 and 40' definitions were excess weight, sporting activities, out-of-school activities, smoking status, working parents and a high family income.
Conclusions: This study, of a large number of adolescents, showed a prevalence of ON similar to that recorded in adult populations. Since factors predisposing to ON in adolescence differ from those for other eating disorders, it is not clear whether ON should be treated as a new form of ED.
Keywords: Adolescence; behavioral addiction; eating disorders; orthorexia nervosa.