Variables that explain disordered eating behaviors among women: the mediating role of body dissatisfaction.

PURPOSE: To analyze the role of body dissatisfaction in the relationships of sociocultural influences, depression, and anxiety with disordered eating behaviors (DEB) in a sample of female Mexican university students. METHODS: A nonrandom sample of 526 female Mexican university students aged 18 to 25 years completed the Questionnaire of Influence on the Aesthetic Model of Body Shape (CIMEC-26), the Hospital Anxiety and Depression Scale (HADS), the Body Shape Questionnaire (BSQ-8D) and the Eating Attitudes Test (EAT-26). RESULTS: Through the mean model (χ2/df (5, n = 526) = 7.298, p = .199; NFI = .996; CFI = .999; RMSEA = .030; SRMR = .011), body dissatisfaction was found to mediate the relationships of influence of advertising, influence of social models and anxiety with DEB (restrictive dieting and bulimia). The variable with the most direct effect on restrictive dieting and bulimia was the influence of advertising. Body dissatisfaction partially mediated this relationship, as the influence of advertising had a significant direct effect on restrictive dieting and bulimia. The final model of direct and indirect effects explained 43% and 22% of the variance in restrictive dieting and bulimia, respectively. CONCLUSION: The present study showed that body dissatisfaction partially mediated the relationships between influence of advertising, influence of social models, and anxiety with DEB among women. Thus, these variables should be taken into account in prevention and intervention programs targeting BED. LEVEL V: Evidence obtained from a cross-sectional descriptive study. LEVEL V: Evidence obtained from a cross-sectional descriptive study.

Content validity of a psychological e-health program of self-control and motivation for adults with excess weight.

Excess weight requires multidisciplinary treatment, including psychology in face-to-face and e-health interventions. The need to analyse interventions' content validity has become evident. The objective is to assess content validity of a psychological e-health program of self-control and motivation for adults with excess weight. Six health professionals (a nutritionist, a personal trainer, physician and three psychologists) evaluated the content validity of the program. The results showed that the item-level content validity index (I-CVI) was 1 (the maximum value) for 11 of the 22 activities that comprise the program. This index fluctuated between 0.83 and 0.85 for the other activities, and the scale-level content validity index was greater than 0.90 for the four modules. In terms of relevance, effectiveness and appropriateness, 90%, 65% and 60% of the activities, respectively, obtained the maximum possible I-CVI, while the index was acceptable for the remainder of the activities. This is the first study about content validity of a psychological program for adults with excess weight in Mexico and it supported that the content program was suitable, and it may be used as a part of multidisciplinary treatments. This study also highlights the importance of involving an expert review in the development of intervention programs. This intervention program may be useful in the context of a multidisciplinary intervention; however, it is important to conduct studies to evaluate its efficacy.

Nuevas pruebas de validez y confiabilidad de la escala reducida del Cuestionario de Imagen Corporal (BSQ-8D) en una muestra de mujeres mexicanas / New evidence about reliability and validity of the short version of the Body Shape Questionnaire (BSQ-8D) in a Sample of Mexican Women

Resumen: Antecedentes: El Cuestionario de Imagen Corporal (BSQ, por sus siglas en inglés) se ha utilizado ampliamente en población clínica y general destacando su carácter unidimensional para la medida de la insatisfacción corporal. Diversas investigaciones han generado hasta 10 versiones cortas basadas en reducciones del BSQ-34. Sin embargo, hasta el momento ninguna de ellas ha sido sometida a pruebas de confiabilidad y validez en muestras independientes. Objetivo: Analizar la estructura interna del BSQ-8D y su relación con los tres factores del Test de Actitudes Alimentarias (EAT-26, por sus siglas en inglés), así como la fiabilidad obtenida con un diseño de consistencia interna y otro de estabilidad temporal en una muestra de mujeres universitarias. Método: Participaron 492 mujeres universitarias quienes contestaron el BSQ-8D y el EAT-26. Resultados: El análisis factorial confirmatorio corroboró la estructura unidimensional del BSQ-8D. La consistencia interna fue adecuada, con α =.91 y ω = .89, así como la confiabilidad test-retest con un CCI = .80. La correlación entre las puntuaciones obtenidas de esta versión del BSQ y el EAT-26 fue de .56 y con sus factores fue .58 para Dieta, .33 para Bulimia y Preocupación por la Comida y .26 para Control Oral. Conclusiones: Estos hallazgos aportan evidencia empírica independiente que apoya la unidimensionalidad, la confiabilidad y la relación con las actitudes hacia la comida del BSQ-8D. Para fortalecer la solidez de esta versión del BSQ-8D hace falta recolectar datos en muestra clínica y en muestras de varones con y sin trastornos alimentarios y de la ingestión de alimentos.

Abstract: Background: The Body Shape Questionnaire (BSQ) has been widely used in the clinical and general population, highlighting its unidimensional nature. Research evidence has generated 10 short versions based on reductions of the BSQ-34. Hitherto, short versions have not been applied to analyze validity and reliability with independent samples. Aim: To analyze the internal structure of the BSQ-8D and its relationship with the three factors of the Eating Attitudes Test-26 (AET-26), as well as the reliability obtained with a design of internal consistency and another of temporal stability in a sample of university women. Methods: Participants were 492 undergraduate women who completed the BSQ-8D and the EAT-26. Results: Confirmatory factor analysis supported the one factor structure of the BSQ-8D. The internal consistency was adequate, α = .91 and ω = .89, as well as the test-retest reliability ICC = .80. Correlation between this BSQ-8D version and those obtained in the EAT-26 was = .56 besides the correlations with its factors .58 for Dieting, .33 for Bulimia and Food Concerns, and .26 for Oral Control. Conclusions: These findings added independent evidence about the unidimensionality of the instrument. To strengthen the robustness of this version of the BSQ-8D it is necessary to collect data in clinical and men sample with and without feeding and eating disorders.

Evaluating different versions of the Body Shape Questionnaire and invariance across age in Mexican women.

PURPOSE: To analyze the factorial structure of the eight short versions of the Body Shape Questionnaire (BSQ) and analyze the factorial invariance of the best model, its convergent validity and its internal consistency in three age groups of Mexican women. METHODS: Women attending middle school (n = 261), high school (n = 245) and university (n = 296) participated in the study; their average age was 16.52 years (SD = 2.98), and they completed the BSQ, the Eating Attitudes Test (EAT-40) and the Questionnaire on the Influences of the Aesthetic Body Ideal (CIMEC, its acronym in Spanish). RESULTS: The BSQ-8D model showed the best goodness-of-fit indices and evidence for configural, metric, scalar and structural invariance. Both the Cronbach's alpha coefficient and the Omega coefficient for the BSQ-8D were .89. Likewise, the BSQ-8D was correlated with the EAT-40 (r = .60, p < .001) and the CIMEC (r = .77, p < .001), and both the total score and its items discriminated between women with and without abnormal eating behaviors (p < .001). CONCLUSION: The BSQ-8D has the best psychometric properties for the measurement of body dissatisfaction in the general population of Mexican women. LEVEL OF EVIDENCE: Level V, cross-sectional descriptive study.

Health-related quality-of-life model in adolescents with different body composition.

The purpose of the present study was to develop and evaluate a causal model of health-related quality of life (HRQoL) in adolescents with different body composition. The participants were 209 adolescents (107 women and 102 men) ranging from 10 to 15 years of age. A model based on that proposed by Wilson and Cleary (JAMA 273(1):59-65, 1995) was elaborated. The body composition of the participants was analyzed. They were asked to complete a battery of questionnaires composed of the following factors: biological status (BS; included body mass index and weight), symptomatic psychological status (SPS; included the variables of drive for thinness and food concerns), functional status (FS; composed of physical activity, food consumption estimation, and socioeconomic status), and HRQoL, which included the dimensions of psychological well-being, autonomy and relationship with parents, social support and peers, and the academic environment. Structural equation modeling produced a model, which obtained an adequate fit for the prediction of HRQoL (χ2(38) = 51.88, p = .07; NNFI = 0.97, CFI = 0.98, GFI = 0.95, and RMSEA = 0.04). The main outcome demonstrated the indirect effect of BS (0.44) and SPS (- 0.45) as well as a direct effect of FS (0.21) on HRQoL. In addition, a second path was observed, BS has an indirect effect on FS (0.34) and FS on HRQoL (0.21). These results provide empirical support for the evaluated model.Level of evidence: Level V, Descriptive study.