The psychometric properties of the Arabic version of the dieting beliefs scale (DBS)

Background

There are relatively few data about the association between locus of control and weight loss in Arabic populations. A tool does exist, the Dieting Belief Scale (DBS), that was designed to measure individuals' beliefs regarding their ability to control their body weight. The aim of this study was to translate this tool into Arabic and to evaluate its psychometric properties.

Methods

The forward translation of the DBS from English to Arabic was completed by two professional bilingual translators, while the back translation from Arabic to English was independently performed by another two different professional bilingual translators. An online survey using the tool was then completed by 245 participants, fully aware of the study's purpose. Psychometric analyses were subsequently conducted to assess the reliability and validity of the Arabic DBS.Internal consistency was examined using Cronbach's α and McDonald's ω coefficients. Test-retest reliability was also assessed. Confirmatory factor analysis was employed to evaluate the fit of a three-factor model, with indices including Comparative Fit Index (CFI), Tucker Lewis Index (TLI), Root Mean Square Error of Approximation (RMSEA), and Standardized Root Mean Square Residual (SRMR). Convergent validity was assessed by examining the correlation between the Arabic DBS and the Eating Attitude Test (EAT-26) previously translated into Arabic, the latter identifying attitudes, feelings and behaviors related to eating.

Results

The Arabic translated DBS scale demonstrated high translation accuracy and content validity estimates. Cronbach's α and McDonald's ω reliability coefficients for the translated scale were approximately 0.91. Test-retest reliability was 0.96. The three-factor model showed an acceptable fit (CFI = 0.93, TLI = 0.92, RMSE = 0.08, SRMR = 0.06). The Arabic version of the DBS was found to have good convergent validity, as evidenced by the significant correlation between the EAT-26 and DBS questionnaires (r = 0.53, p < 0.01).

Conclusion

The Arabic version of the DBS is highly reliable and has sufficient content validity to measure belief about personal ability to control one's weight.

The bioelectrical impedance analysis (BIA) international database: aims, scope, and call for data

BACKGROUND

Bioelectrical impedance analysis (BIA) is a technique widely used for estimating body composition and health-related parameters. The technology is relatively simple, quick, and non-invasive, and is currently used globally in diverse settings, including private clinicians' offices, sports and health clubs, and hospitals, and across a spectrum of age, body weight, and disease states. BIA parameters can be used to estimate body composition (fat, fat-free mass, total-body water and its compartments). Moreover, raw measurements including resistance, reactance, phase angle, and impedance vector length can also be used to track health-related markers, including hydration and malnutrition, and disease-prognostic, athletic and general health status. Body composition shows profound variability in association with age, sex, race and ethnicity, geographic ancestry, lifestyle, and health status. To advance understanding of this variability, we propose to develop a large and diverse multi-country dataset of BIA raw measures and derived body components. The aim of this paper is to describe the 'BIA International Database' project and encourage researchers to join the consortium.

METHODS

The Exercise and Health Laboratory of the Faculty of Human Kinetics, University of Lisbon has agreed to host the database using an online portal. At present, the database contains 277,922 measures from individuals ranging from 11 months to 102 years, along with additional data on these participants.

CONCLUSION

The BIA International Database represents a key resource for research on body composition.

The Preventable Effect of Taekwondo Sport among Cadets and Junior' Bone Mineral Density: DEXA Assessment

Athletes competing in Taekwondo (TKD), the weight-category sport, tend to rapidly lose weight to achieve the desired body weight for better competitive results. Little is known about the effect of rapid weight reduction on bone mass density (BMD), especially during childhood and adolescence. The current study aimed to investigate the impact of rapid weight loss on BMD among cadets and juniors TKD athletes. A descriptive case series study design was conducted and collected from 28 males and females aged 12-17 years old, with mean age 14.4 ± 1.7. Dual-energy X-ray absorptiometry (DEXA) was used for both BMD and body composition assessment, and laboratory tests were also performed for the total calcium (Ca), TSH, free T4 (FT4), and 25-OH-vitamin D. Results showed normal levels of Ca (82.1%), TSH (96.4%), and FT4 (96.4%), whilst 85.7% had vitamin D deficiency. DEXA results showed that within male athletes, juniors had a wider range of BMD than cadets, while within females, results did not vary, with no statistical difference between both males and females. Our results suggested that children and adolescents' BMD was positively related to TKD sport regardless of the abnormal weight loss strategies used, as evidenced by laboratory results. Children and adolescents should be conscious and practice TKD sport adopting healthy weight loss behaviors.

Evaluation of Knowledge, Attitudes, and Practices Related to Dietary Supplements Intake among College Students: A Cross-sectional Study

Introduction: Food intake has been connected to health status for a long time. There are some products that are used to boost the nutrient density of the food intake, such as dietary supplements (DS). DS can defined as a concentrated source of nutrients with a nutritional or physiological effect that adds further nutritional value to the normal diet. Aim: This study investigated the intake of DS among students at the University of Jordan (JU) in Amman, as well as consumer’s Knowledge, Attitudes and Practices (KAP) regarding DS according to gender, Body Mass Index (BMI), science and humanities, and academic year streams. Materials and Methods: A descriptive cross-sectional questionnaire-based study was conducted over three months on 381 students selected by using convenient sampling method from the JU from different faculties including freshmen students and senior students between April and May 2018. The KAP was used to assess awareness of the study group on the topic. The questionnaire was divided into two parts, part I included questions related to participant’s socio-demographic characteristics and part II included 11 questions for assessing KAP related to DS. Face to face interview technique was used for data collection. Statistical analysis was performed using the Statistical Package for the Social Sciences (SPSS) program (version 22.0). Pearson’s chi-square test for independence was used for the qualitative variables to detect the relationship between gender, BMI, faculty (humanities or science) and academic year and the corresponding KAP toward DS. p-value less than 0.05 was considered as statistically significant. Results: The results showed that the overall percentage of student’s knowledge of DS is only 13.65%, which indicates lack of knowledge in regard to DS. It was found that the percentage of intake of DS at least one per week among students was approximately 42%, which is considered relatively high. Regarding the results of the present study, there were statistically significant differences in faculty (p=0.001**) and BMI subdivisions (p=0.03*) in term of previous knowledge. Science facultie’s students had more information than humanities about the risks of DS (p=0.008*). Nearly (80%) of science and humanities faculties’ students have not received any training or attended in any health campaign about DS. Most of the students trusted the information that comes from health care professionals (65%). One third of DS users consumed them for no certain purpose (34%). Pharmacies were the most common source to buy supplements (87%). Furthermore, vitamin D and iron were the most frequently reported DS type used, while herbal supplements, omega 6, omega 9, multi minerals were the least common DS among participants. Conclusion: It can be concluded from results of this study that there was a relative high prevalence of DS consumption among JU students and students in general lacked knowledge about DS.