Tineke de Vriendt

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OBJECTIVE To describe the standardization process and reliability of anthropometric and bioelectrical impedance analysis (BIA) measurements. We examined both intra- and interobserver errors for skinfolds, circumferences and BIA. METHODS For the intraobserver error assessment, first of all, 202 adolescents in the pilot study (110 boys, 92 girls, aged(More)
BACKGROUND/OBJECTIVES Our objective was to describe the fluid and energy consumption of beverages in a large sample of European adolescents. SUBJECTS/METHODS We used data from 2741 European adolescents residing in 8 countries participating in the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS). We averaged two(More)
This paper investigated the validity of self-reported height and weight of adolescents for the diagnosis of underweight, overweight and obesity and the influence of weighing behaviour on the accuracy. A total of 982 adolescents reported their height, weight, weighing behaviour and eating patterns in a questionnaire. Afterwards, their height and weight were(More)
OBJECTIVE Atherogenesis involves an inflammatory process that occurs early in life even though clinical symptoms are not observed until adulthood. Two important protective factors for low-grade inflammation may be physical activity (PA) and fitness. We examined the independent associations of objective and subjective measurements of PA and fitness with(More)
The prevalence of childhood stress has repeatedly been shown to be high, with 'parental separation' and 'being bullied at school' as the most frequently reported stressors in the child's everyday life. This is quite alarming as children are most vulnerable to the adverse psychological and physiological health consequences of chronic stress exposure. Despite(More)
AIMS This review describes the role of chronic stress in the development of obesity and available methodologies for the assessment of chronic stress in humans, in particular adolescents, with the aim of developing a feasible methodology to implement in an epidemiological study. DATA SYNTHESIS Chronic stress seems to be associated with the aetiology of(More)
To evaluate the impact of stress on children's well-being, it is important to have valid and reliable stress assessment methods. Nevertheless, selection of an appropriate method for a particular research question may not be straightforward, as there is currently no consensus on a reference method to measure stress in children. This article examined to what(More)
The present study investigated the role of socio-demographic and lifestyle determinants on the nutrition knowledge of Belgian women and the association between their knowledge and dietary behaviour. A total of 803 women, aged 18-39 years, were included in a cross-sectional study and completed a general and nutrition knowledge questionnaire and a 2-day food(More)
BACKGROUND/AIMS Salivary cortisol has been widely used to assess childhood stress. Yet, there is no consensus on reference concentrations, awakening response, guideline compliance and contribution of sampling factors to the variation in children's salivary cortisol levels. METHODS Samples were collected from 444 Belgian children participating in the ChiBS(More)
BACKGROUND Quantitative ultrasound (QUS) is a quick, non-invasive and inexpensive method to measure bone strength. Moreover, the device is portable, which makes it easy to be used in the field. In contrast to other bone measuring techniques, QUS does not use any ionised radiation. However, the validity of QUS in the measurement of bone health and the(More)