Gian Mauro Manzoni1,2, Alessandro Rossi3,4, Giada Pietrabissa3,5, Giorgia Varallo3, Enrico Molinari3,5, Eleonora Poggiogalle6, Lorenzo Maria Donini6, Giulietta Tarrini7, Nazario Melchionda7, Carla Piccione8, Giovanni Gravina9, Gianluigi Luxardi10, Emilia Manzato11, Romana Schumann12, Marco Innamorati13, Claudio Imperatori13, Mariantonietta Fabbricatore13, Gianluca Castelnuovo3,5. 1. Istituto Auxologico Italiano IRCCS, Psychology Research Laboratory, Via Luigi Cadorna, 90, Piancavallo, Oggebbio, VCO, Italy. gm.manzoni@auxologico.it. 2. Faculty of Psychology, eCampus University, Novedrate, Como, Italy. gm.manzoni@auxologico.it. 3. Istituto Auxologico Italiano IRCCS, Psychology Research Laboratory, Via Luigi Cadorna, 90, Piancavallo, Oggebbio, VCO, Italy. 4. Interdepartmental Center for Family Research, Department of Philosophy, Sociology, Education, and Applied Psychology, Section of Applied Psychology, University of Padova, Padua, Italy. 5. Department of Psychology, Catholic University, Milan, Italy. 6. Department of Experimental Medicine, Sapienza University, Rome, Italy. 7. Department of Internal Medicine, University Alma mater, Bologna, Italy. 8. Center for Eating Disorders, S. Rossore Clinic, Pisa, Italy. 9. Center for Eating Disorders, ASL Tuscany Nord West, Pisa, Italy. 10. Center for Eating Disorders, ASL5 West Friuli, Pordenone, Italy. 11. Eating and Weight Disorders Centre, Private Hospital Salus, Ferrara, Italy. 12. Gruber Center for Eating Disorders, Bologna, Italy. 13. Department of Human Sciences, European University of Rome, Rome, Italy.
Abstract
PURPOSE: This study was aimed to examine the structural and construct validity of the Italian version of the Yale Food Addiction Scale in a multisite sample of postgraduate students. METHODS: Two hundred and fifty-six subjects (78.1% females) aged from 18 to 53 years (mean = 23.93, SD = 4.96) and attending different postgraduate university programs at multiple Italian universities completed the Italian YFAS, the Italian Binge Eating Scale (BES), the Italian Eating Attitudes Test-26 and the Italian Dutch Eating Behavior Questionnaire (DEBQ) online through Qualtrics. RESULTS: Confirmatory Factor Analysis showed that the single-factor model of the Italian YFAS including all original items had adequate fit indexes (χ2252 = 454.183; p < 0.001; normed χ2 = 1.802; RMSEA = 0.056; 90% CI 0.048-0.076; CFI = 0.761; WRMR = 1.592). However, item analysis revealed that item#25 had zero variance (all subjects were assigned the same score after item dichotomization) and item#24 had a low factor loading, and were thus removed. Furthermore, item#10 and item#11 showed to be almost perfectly correlated (r = 0.998) and were thus parceled. The resulting 19-item single-factor model revealed a better fit to the data (χ2152 = 235.69; p < 0.001; normed χ2 = 1.556; RMSEA = 0.046; 90% CI 0.034-0.058; CFI = 0.858; WRMR = 1.236) and its internal consistency was acceptable (KR-20 = 0.72). Also, a single-factor model including the seven diagnostic symptoms was tested and showed adequate fit values (χ220 = 41.911; p < 0.003; normed χ2 = 2.09; RMSEA = 0.065; 90% CI 0.037-0.093; CFI = 0.946; WRMR = 1.132). Statistically significant and small-to-high correlations were found with all convergent measures, in particular with the BES. CONCLUSION: The Italian 19-item YFAS resulted to be a valid and reliable tool for the assessment of food addiction in postgraduate students. LEVEL OF EVIDENCE: Level V, descriptive study.
PURPOSE: This study was aimed to examine the structural and construct validity of the Italian version of the Yale Food Addiction Scale in a multisite sample of postgraduate students. METHODS: Two hundred and fifty-six subjects (78.1% females) aged from 18 to 53 years (mean = 23.93, SD = 4.96) and attending different postgraduate university programs at multiple Italian universities completed the Italian YFAS, the Italian Binge Eating Scale (BES), the Italian Eating Attitudes Test-26 and the Italian Dutch Eating Behavior Questionnaire (DEBQ) online through Qualtrics. RESULTS: Confirmatory Factor Analysis showed that the single-factor model of the Italian YFAS including all original items had adequate fit indexes (χ2252 = 454.183; p < 0.001; normed χ2 = 1.802; RMSEA = 0.056; 90% CI 0.048-0.076; CFI = 0.761; WRMR = 1.592). However, item analysis revealed that item#25 had zero variance (all subjects were assigned the same score after item dichotomization) and item#24 had a low factor loading, and were thus removed. Furthermore, item#10 and item#11 showed to be almost perfectly correlated (r = 0.998) and were thus parceled. The resulting 19-item single-factor model revealed a better fit to the data (χ2152 = 235.69; p < 0.001; normed χ2 = 1.556; RMSEA = 0.046; 90% CI 0.034-0.058; CFI = 0.858; WRMR = 1.236) and its internal consistency was acceptable (KR-20 = 0.72). Also, a single-factor model including the seven diagnostic symptoms was tested and showed adequate fit values (χ220 = 41.911; p < 0.003; normed χ2 = 2.09; RMSEA = 0.065; 90% CI 0.037-0.093; CFI = 0.946; WRMR = 1.132). Statistically significant and small-to-high correlations were found with all convergent measures, in particular with the BES. CONCLUSION: The Italian 19-item YFAS resulted to be a valid and reliable tool for the assessment of food addiction in postgraduate students. LEVEL OF EVIDENCE: Level V, descriptive study.
Entities:
Keywords:
Food addiction; University students; Validity; YFAS
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