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Validity of the Eating Attitudes Test: a study of Mexican eating disorders patients
G Alvarez-Rayón1, J M Mancilla-Díaz, R Vázquez-Arévalo
1Nutrition Research Department, FES Iztacala, Universidad Nacional Autónoma de México. alvarezr@servidor.unam.mx
Objective:
To evaluate the psychometric properties of the Mexican version of the Eating Attitudes Test (EAT-40) in clinical and control populations in Mexico City.
Method:
276 female patients with eating disorders [52 with anorexia nervosa (AN), 102 with bulimia nervosa (BN) and 122 with eating disorders not otherwise specified (EDNOS)] and a comparison group of 280 normal control female subjects completed the EAT.
Results:
The EAT had an adequate level of internal consistency in the clinical sample (Cronbach's alpha=0.90). Total score was significantly correlated with criterion group membership (r=0.77, p< or =0.0001), suggesting a high level of concurrent validity. There was a small overlap in the frequency distribution of the 2 groups (eating disorders and control) and only 6% of the normal controls scored as high as lowest anorexic and bulimic patients. The factorial analysis yielded five factors accounting for 46.6% of total variance: 1) Dietary restraint, 2) Bulimia, 3) Drive of thinness, 4) Food preoccupation and 5) Perceived social pressure.
Conclusions:
This study provides evidence that the Mexican version of the EAT is an economical, reliable and potentially useful instrument for research in this field.
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