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BackgroundOrthorexia nervosa (ON) is a concept introduced in 1997. It is defined as excessive concentration on healthy eating. Orthorexia can lead to health loss and disrupt the psychosocial functioning of a person. A significant and current research problem on nervous orthorexia is the lack of appropriate diagnostic tools. One of the promising tools for studying orthorexia behavior is the Teruel Orthorexia Scale (TOS). This scale allows distinguishing pathological orthorexia (Ne) from healthy orthorexia (He), defined as an interest in healthy eating free from psychopathology. There are still no tools to measure orthorexia-related behavior with good psychometric properties. Therefore, this study aimed to adapt and validate Teruel Orthorexia Scale (TOS) in Poland. MethodsThe research involved the evaluation of 680 questionnaires collected in a group of adult Poles (18-68 years old). The research was conducted in the period from June 2019 to March 2020. The diagnostic survey method was used to collect the data. The study used the TOS scale translated into Polish and the Polish adaptation of the ORTO-15 scale. The obtained results were statistically analyzed. The validation procedure included three primary methods: assessment of the discriminant power, reliability, and validity of the tool compared to the ORTO-15 scale. ResultsAlmost all items of the validated scale achieved a satisfactory value of discriminant power >0.3. The individual TOS subscales were characterized by high reliability (TOS He = 0.87; TOS Ne = 0.78). The validity analysis of the validated tool consisting in correlating the obtained results with the results of the ORTO-15 questionnaire showed a significant correlation between the scales (healthy orthorexia r = -0.36; pathological orthorexia r = -0.19). ConclusionsThe Polish version of the TOS scale is a reliable and valuable tool for measuring orthorexia-related behavior in the Polish adult population. |
