Scale of Eating Behavior Phenotypes (EFCA), confirmatory factor analysis and psychometric properties

Abstract

Introduction: weight gain depends on multiple modifiable mediating factors, including ingestive behavior phenotype. The Eating Behavior Phenotypes Scale (EFCA) is a self-administered questionnaire designed as a tool for clinical use to characterize different sub-phenotypes of ingestive behavior: hedonic, compulsive, emotional grazing, disorganized and hyperphagic. Objectives: the aim of this study is to validate the psychometric properties of the Eating Behavior Phenotypes Scale (EFCA), to analyze the stability of the construct and its external validity. Materials and methods: three hundred adult participants completed a self-administered survey developed to identify eating behavior phenotypes (EFCA). A confirmatory factor analysis was performed, internal consistency was evaluated using Cronbach’s alpha coefficient, and concurrent validity was assessed using Pearson’s correlation method between EFCA and BMI. Results: the EFCA scale and the subscales showed an acceptable internal consistency (α > 0.70). The confirmatory factor analysis showed a good adjustment of the data to the proposed structure (SBχ92 2 = 155, p < 0.05; CFI = 0.97; TLI = 0.96; RMSEA = 0.05; SRMR = 0.04). A positive and statistically significant correlation was found between BMI and both each subscale and total scale scores. Conclusions: EFCA and its subscales are a valid instrument to assess eating phenotypes in adults. The five-component structure shows high stability and consistent results in relation to a previous study carried out with a sample of obese patients.