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Psychometric properties of the ORTO-R in an adult population: the Turkish version, reliability, and validity study.
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Kaya Seda, Asil Esma, Çakıroğlu Funda Pınar, Sertdemir Sümeyye, Can Yaren, Muradoğlu Emine
Аннотация
PURPOSE: This study aimed to examine the psychometric properties of a Turkish version of the ORTO-R scale by testing its factorial structure, reliability, and validity in a large adult population.
METHODS: This cross-sectional study was conducted between November 2022 and February 2023. Through an online questionnaire, 1077 participants were recruited. Confirmatory factor analysis (CFA) was used to examine the construct validity of the questionnaires. The internal consistency of the ORTO-R scale was evaluated with Cronbach's alpha, Omega and test-retest coefficients. For the convergent and divergent validity of the scale, Pearson correlation analysis was performed on the scores of the Eating Attitude Test-26, the Generalized Anxiety Disorder-7 and the Life Satisfaction Scale.
RESULTS: The two-factor model fit the data well. Analyses confirmed that the two-factor model of the ORTO-R had acceptable or good fit indices (χ 2/df = 2.126; GFI = 0.997; CFI = 0.992; AGFI = 0.992; TLI = 0.985; RMSEA = 0.032; SRMR = 0.029). According to the reliability coefficients, the orthorexia nervosa and method subscales were found to be reliable. The correlations supported the convergent and divergent validity of the scale.
CONCLUSIONS: The results demonstrate that the Turkish version of the ORTO-R is a valid and reliable instrument for assessing orthorexic behaviors in a theoretically meaningful way.
LEVEL OF EVIDENCE: Level V, descriptive study.
METHODS: This cross-sectional study was conducted between November 2022 and February 2023. Through an online questionnaire, 1077 participants were recruited. Confirmatory factor analysis (CFA) was used to examine the construct validity of the questionnaires. The internal consistency of the ORTO-R scale was evaluated with Cronbach's alpha, Omega and test-retest coefficients. For the convergent and divergent validity of the scale, Pearson correlation analysis was performed on the scores of the Eating Attitude Test-26, the Generalized Anxiety Disorder-7 and the Life Satisfaction Scale.
RESULTS: The two-factor model fit the data well. Analyses confirmed that the two-factor model of the ORTO-R had acceptable or good fit indices (χ 2/df = 2.126; GFI = 0.997; CFI = 0.992; AGFI = 0.992; TLI = 0.985; RMSEA = 0.032; SRMR = 0.029). According to the reliability coefficients, the orthorexia nervosa and method subscales were found to be reliable. The correlations supported the convergent and divergent validity of the scale.
CONCLUSIONS: The results demonstrate that the Turkish version of the ORTO-R is a valid and reliable instrument for assessing orthorexic behaviors in a theoretically meaningful way.
LEVEL OF EVIDENCE: Level V, descriptive study.