Distribución del índice triglicéridos y glucosa (TyG) y el modelo homeostático para la evaluación de la resistencia a la insulina en la adolescencia tardía en mexicanos / Distribution of triglycerides and glucose (TyG) index and homeostasis model assessment insulin resistance for the evaluation of insulin sensitivity on late adolescence in Mexicans

Introducción: cuando los tejidos periféricos tienen una incapacidad para responder a la acción de la insulina se denomina resistencia a la insulina (RI). Existen diferentes métodos para la identificación de la RI; uno de estos es el índice HOMA-IR, que utiliza los parámetros de laboratorio, glucosa e insulina en ayunas. El índice triglicéridos y glucosa (TyG) presenta la ventaja de solo necesitar análisis de laboratorio de rutina. Objetivo: evaluación de la distribución de los índices HOMA-IR y TyG en la población, así como determinar la capacidad predictiva del índice HOMA-IR utilizando el TyG como prueba diagnóstica para la RI. Materiales y métodos: estudio analítico transversal con 1686 participantes de 18 a 21 años del estado de San Luis Potosí. Se tomaron variables antropométricas de peso y talla y se cuantificó la concentración de glucosa, insulina y triglicéridos en ayuno. Además, se realizó un cuestionario para conocer los antecedentes heredofamiliares y la presencia de enfermedades no transmisibles (ENT). Para la comparación entre mujeres y hombres se realizó una prueba de la t de Student y se realizaron curvas operador receptor (COR) para determinar los valores de corte del HOMA-IR. (AU)

Introduction: when peripheral tissues don't respond well to insulin action, it is defined as insulin resistance (IR). Many methods and indices are available for the estimation of IR, among them the homeostasis model assessment of insulin resistance (HOMA-IR) involves fasting plasma glucose and insulin. Nevertheless, the TyG index has a methodological advantage over the HOMA-IR because it requires only measurements provided by routine laboratory tests. Aim: distribution asessment of the HOMA-IR and TyG indexes in the sample. Also, to determine the predictive capacity of HOMA-IR, using TyG cutoff point as IR-positive diagnostic test. Materials and methods: a cross-sectional analytical study with 1686 participants aged 18 to 21 years from the state of San Luis Potosí, Mexico. Anthropometric assessment involves variables of weight and height. Fasting glucose, insulin and triglyceride concentrations were quantified. In addition, a questionnaire was carried out to know the hereditary family history and the presence of noncommunicable diseases (NCDs). Student's t-test was used to assess the differences in mean statistics between males and females. A receiver operating characteristic (ROC) curve was applied to examine the potential of HOMA-IR to identify IR. (AU)

Promoción de la adherencia terapéutica de mujeres con obesidad mediante psicoeducación / Promotion of therapeutic adherence in obese women through a psychoeducative intervention

Resumen El sobrepeso y la obesidad de la población mexicana constituyen un serio problema de salud. Para su control, se requiere del paciente una adherencia terapéutica muy alta, que implica el seguimiento de las instrucciones médicas, cambios en estilos de alimentación y ejercicio, además de cambios en cogniciones, conductas y actitudes relacionadas con la obesidad. El logro de la adherencia resulta difícil, especialmente para las mujeres. En la presente investigación se implementó una intervención psicoeducativa para promover una mayor adherencia terapéutica en un grupo de ocho mujeres con sobrepeso u obesidad que recibían servicios públicos de salud para bajar de peso, los cuales comprendían apoyo médico, de trabajo social, de nutrición y de ejercicio físico. La intervención se realizó semanalmente, consistió en doce sesiones de 90 minutos cada una. Se utilizó un diseño cuasi experimental con grupo control. Se evaluó mediante valores antropométricos, indicadores biológicos y la escala OQL-2007 de O'Donnell y Warren. Los resultados mostraron cambios significativos en los indicadores biológicos y en cogniciones, conductas y actitudes hacia el sobrepeso y obesidad, por lo que se concluye que la psicoeducación, combinada con los otros apoyos mencionados, es efectiva para aumentar la adherencia terapéutica.

Abstract The overweight and obesity in the Mexican population have become a severe health issue that requires high levels of therapeutic adherence in order to control it, including changes in life style, diet and exercise, and modifications in cognitions, behaviors and attitudes towards obesity. The achievement of adherence is a complex process especially for women. This research implemented a psychoeducative intervention to increase the therapeutic adherence in an experimental group of eight obese or overweight women who receive support in the public health system to reduce weight, including medical and social work support and also nutritionist and physical activation. A quasi-experimental study with a control group of eight women was designed. Results show significant changes in biological and anthropometric indicators and in cognitions, behaviors and attitudes toward overweight and obesity. It is concluded that psychoeducation combined with other support actions is effective to improve the therapeutic adherence.

Psychological Effects of Group Hypnotherapy on Breast Cancer Patients During Chemotherapy.

The purpose of this study was to evaluate the effect of group hypnotherapy on anxiety, depression, stress, self-esteem, optimism, and social support during chemotherapy, in patients with breast cancer, compared with a control group with standard medical care. Hypnotherapy consisted of 24 sessions that included suggestions to encourage relaxation, self-esteem, the resolution of past traumatic events, physical healing, and optimism. Results show that the hypnotherapy group significantly decreased anxiety, distress, increased self-esteem, and optimism in the first 12 sessions. However, at the end of the 24 sessions, only self-esteem and optimism remained significant compared with the control group. The convenience of using hypnotherapy to encourage optimism and self-esteem in patients with breast cancer during chemotherapy treatment is discussed given its protective effect on health.

Validation of the SCOFF questionnaire for screening of eating disorders among Mexican university students.

PURPOSE: To evaluate the criterion validity and diagnostic utility of the SCOFF, a brief eating disorder (ED) screening instrument, in a Mexican sample. METHODS: The study was conducted in two phases in 2012. Phase I involved the administration of self-report measures [the SCOFF and the Eating Disorder Inventory-2, (EDI-2)] to 1057 students aged 17-56 years (M age = 21.0, SD = 3.4; 67 % female) from three colleges at the Universidad Autónoma de San Luis Potosí, Mexico. In Phase II, a random subsample of these students (n = 104) participated in the eating disorder examination, a structured interview that yields ED diagnoses. Analyses were conducted to evaluate the SCOFF's criterion validity by examining (a) correlations between scores on the SCOFF and the EDI-2 and (b) the SCOFF's ability to differentiate diagnosed ED cases and non-cases. RESULTS: EDI-2 subscales showed high correlations with the SCOFF scores proving initial evidence of criterion validity. A score of two points on the SCOFF optimized the sensitivity (78 %) and specificity (84 %). With this cutoff, the SCOFF correctly classified over half the cases (PPV = 58 %) and screened out the majority of non-cases (NPV = 93 %) providing further evidence of criterion validity. Analyses were repeated separately for men and women, yielding gender-specific information on the SCOFF's performance. CONCLUSIONS: Taken as a whole, results indicated that the SCOFF can be a useful tool for identifying Mexican university students who are at risk of eating disorders.

Evaluation of the psychometric performance of the SCOFF questionnaire in a Mexican young adult sample / Evaluación del desempeño psicométrico del cuestionario SCOFF en una muestra de adultos jóvenes mexicanos

OBJECTIVE: To examine the psychometric performance of the SCOFF, a brief screening instrument for eating disorders (ED). MATERIALS AND METHODS: Mexican university applicants (n= 3594, 55.7% female, M age= 18.1 years) completed self-report measures and a health screen. RESULTS: Confirmatory factor analyses revealed one factor for females. However a bifactor model fits better for males and females. Reliability was lower for females (KR20 = .49) than males (KR20 = .59). More females (24.2%) presented risk for ED (SCOFF > 2) than males (11.2%). Nomological validity indicated that risk for ED in young women was associated with demographic (e.g., parental education), psychological (e.g., depression, weight management efficacy), physical (e.g., BMI), and social (e.g., family conflict) indicators in conceptually coherent ways. Fewer variables were significant for males. CONCLUSION: Although the SCOFF may be a useful ED screen in Mexico, further research must examine its criterion validity, sensitivity, and specificity.

OBJETIVO: Examinar el desempeño psicométrico del SCOFF, un instrumento de tamizaje para trastornos de conducta alimentaria (TCA). MATERIAL Y MÉTODOS: Aspirantes mexicanos a una universidad (n = 3594, 55.7% mujeres, edad M = 18.1 años) completaron cuestionarios y una revisión médica. RESULTADOS: Análisis factoriales confirmatorios revelaron un factor para mujeres, aunque un modelo bifactorial funcionó mejor para hombres y mujeres. La fiabilidad fue menor en mujeres (KR20= .49) que en hombres (KR20= .59). Las mujeres (24.2%) presentaron mayor riesgo de TCA (SCOFF > 2) que hombres (11.2%). Validez nomológica indicó que el riesgo de TCA en mujeres jóvenes estuvo asociado con indicadores demográficos (e.g., educación paterna), psicológicos (e.g., depresión, control eficaz de peso), físicos (e.g., IMC), y sociales (e.g., conflicto familiar) de forma conceptualmente coherente. Un subconjunto de estas variables fueron significativas para los hombres. CONCLUSIÓN: El SCOFF podría ser un tamizaje de TCA útil en México. Sin embargo, se requiere más investigación sobre su validez de criterio, sensibilidad y especificidad.

Evaluation of the psychometric performance of the SCOFF questionnaire in a Mexican young adult sample.

OBJECTIVE: To examine the psychometric performance of the SCOFF, a brief screening instrument for eating disorders (ED). MATERIALS AND METHODS: Mexican university applicants (n= 3594, 55.7% female, M age= 18.1 years) completed self-report measures and a health screen. RESULTS: Confirmatory factor analyses revealed one factor for females. However a bifactor model fits better for males and females. Reliability was lower for females (KR20 = .49) than males (KR20 = .59). More females (24.2%) presented risk for ED (SCOFF > 2) than males (11.2%). Nomological validity indicated that risk for ED in young women was associated with demographic (e.g., parental education), psychological (e.g., depression, weight management efficacy), physical (e.g., BMI), and social (e.g., family conflict) indicators in conceptually coherent ways. Fewer variables were significant for males. CONCLUSION: Although the SCOFF may be a useful ED screen in Mexico, further research must examine its criterion validity, sensitivity, and specificity.

Mexican norms for the Stanford Hypnotic Susceptibility Scale, Form C.

Normative data for the Mexican adaptation of the Stanford Hypnotic Susceptibility Scale, Form C (SHSS:C) are presented. Twenty-seven raters administered the scale to 513 Mexican volunteers. Score distribution, item analysis, and reliability of the SHSS:C are presented and compared to other international norming studies. The findings show that the Mexican adaptation of the SHSS:C has psychometric properties essentially comparable to those of the Dutch, German, Italian, and United States reference samples. However, the elevated sample mean suggests Mexicans may have an elevated ability to engage in hypnotic behavior, thus they would likely be especially good candidates for hypnotherapeutic interventions that would better the health options currently available.