Publications by authors named "Olivier Klein"

Objective: Scaphocephaly represents the most frequent single-suture craniosynostosis, with a male prevalence. In many cases, prominent frontal bossing (sphenocephaly) is the major aesthetic concern, typically in school-aged children. This aspect is also usually found in patients with late presentation (after 1 year of age).

View Article and Find Full Text PDF

(1) Background: Surgery for Chiari I malformation (CMI) is indicated when typical clinic-radiological features (syringomyelia, exertional headaches, sleep apnea syndrome, and tetraparesis) are present. Sometimes, patients have atypical complaints suggestive of otolaryngological (ENT) involvement, and it is sometimes difficult for the neurosurgeon to determine if these complaints are related to the CMI. Our aim was to describe postural control patterns in children with CMI using computerized dynamic posturography.

View Article and Find Full Text PDF

Conspiracy beliefs are prevalent among members of disadvantaged groups. Adopting a social identity perspective, we hypothesized that these beliefs would reduce the endorsement of internal attributions for inequalities that could negatively affect the image of disadvantaged ingroups. In Study 1 ( = 1,104), conspiracy mentality was negatively associated with meritocracy beliefs, which attribute success and failure to internal factors.

View Article and Find Full Text PDF
Article Synopsis
  • Spinal ganglioneuromas are rare neuroblastic tumors mostly found in children, originating from sympathetic ganglia near the spine, and can lead to radicular or medullary symptoms when they extend into the spinal canal.
  • A thorough review of pediatric cases was conducted, highlighting a unique case treated in France, focusing on the thoraco-lumbar region due to its different surgical management requirements.
  • The review identified 21 pediatric patients, predominantly females, with the majority (42.85%) of tumors located in the thoracic spine, while the featured case presented unusual symptoms including abdominal pain and renal complications.
View Article and Find Full Text PDF

Increasing ethnic and racial diversity often fuels feelings of threat among ethnic-racial majorities (e.g., self-identified white Americans and European nationals).

View Article and Find Full Text PDF

Background: Greenness exposure has been associated with many health benefits, for example through the pathway of providing opportunities for physical activity (PA). Beside the limited body of longitudinal research, most studies overlook to what extent different types of greenness exposures may be associated with varying levels of PA and sedentary behavior (SB). In this study, we investigated associations of greenness characterized by density, diversity and vegetation type with self-reported PA and SB over a 9-year period, using data from the ORISCAV-LUX study (2007-2017, n = 628).

View Article and Find Full Text PDF

Despite growing interest in understanding how food environments shape dietary behaviors, European longitudinal evidence is scarce. We aimed to investigate the associations of 9-year average and change in exposure to local retail food environments with the diet quality of residents in Luxembourg. We used data from 566 adults enrolled in both waves of the nationwide ORISCAV-LUX study (2007-2017).

View Article and Find Full Text PDF

Background: People's perceived risk of being infected and having severe illness was conceived as a motivational source of adherence to behavioral measures during the COVID-19 crisis.

Methods: We used online self-reported data, spanning 20 months of the COVID-19 crisis in Belgium (n = 221,791; 34.4% vaccinated; July 2020 - March 2022) to study the association between risk perception and motivation.

View Article and Find Full Text PDF

Current-induced self-sustained magnetization oscillations in spin-torque nano-oscillators (STNOs) are promising candidates for ultra-agile microwave sources or detectors. While usually STNOs behave as a monochromatic source, we report here clear bimodal simultaneous emission of incommensurate microwave oscillations in the frequency range of 6 to 10 gigahertz at femtowatt level power. These two tones correspond to two parametrically coupled eigenmodes with tunable splitting.

View Article and Find Full Text PDF

The essential role of the psychological needs for autonomy, competence, and relatedness in well-being has been demonstrated convincingly. Yet whether their fulfillment also serves as a source of resilience in the face of adversity has received limited attention. A longitudinal sample of Belgian citizens (N = 1869; M = 56.

View Article and Find Full Text PDF

We describe the first case of regression of a white epidermoid cyst in a child. White epidermoid cysts are rare benign lesions, particularly in pediatric cases. Typically, these cysts need surgical resection.

View Article and Find Full Text PDF

A growing body of evidence suggests that urban densification may be protective against obesity, type 2 diabetes, and cardiometabolic diseases, yet studies on how built environmental features relate to metabolic syndrome (MetS) and its components are scarce. This longitudinal study examines the associations of baseline urban density and densification over 9 years with MetS and MetS components, among 510 participants enrolled in both waves of the ORISCAV-LUX study (2007-2017) in Luxembourg. A continuous MetS score (siMS) was calculated for each participant.

View Article and Find Full Text PDF

Growing evidence shows a beneficial effect of exposure to greenspace on cardiometabolic health, although limited by the cross-sectional design of most studies. This study examined the long-term associations of residential greenness exposure with metabolic syndrome (MetS) and MetS components within the ORISCAV-LUX study (Wave 1: 2007-2009, Wave 2: 2016-2017, n = 395 adults). Objective exposure to residential greenness was measured in both waves by the Soil-Adjusted Vegetation Index (SAVI) and by Tree Cover Density (TCD).

View Article and Find Full Text PDF
Article Synopsis
  • Many new COVID-19 variants and the vaccines not working as well made experts suggest extra shots, like boosters and yearly doses.
  • A study looked at how people's feelings about their first vaccine dose affected whether they wanted more shots later.
  • It found that people who were more motivated to get vaccinated were more likely to want booster shots, while those with more obstacles were less interested in getting them.
View Article and Find Full Text PDF

To limit the spread of COVID-19, public authorities have recommended sanitary behaviors such as handwashing, mask-wearing, physical distancing, and social distancing. We recruited a large sample of higher education students in Belgium ( = 3201-3441) to investigate the role of sociodemographic variables, mental health, previous COVID-19 infections, academic involvement, and risk perception on adherence to these sanitary behaviors. This cross-sectional study took place during the second COVID-19 wave in Belgium, between February and March 2021.

View Article and Find Full Text PDF

Background: The stringency of the measures taken by governments to combat the COVID-19 pandemic varied considerably across countries and time. In the present study, we examined how the proportionality to the epidemiological situation is related to citizens'behavior, motivation and mental health.

Methods: Across 421 days between March 2020 and March 2022, 273,722 Belgian participants ( = 49.

View Article and Find Full Text PDF

This vignette-based study examined in a sample of unvaccinated Belgian citizens ( = 1918;  = 45.99) how health care workers could foster reflection about and intentions to get vaccinated against COVID-19 by experimentally varying their communication style (i.e.

View Article and Find Full Text PDF

Objective: Across nationwide rollout of COVID-19 vaccination, people in Belgium differed widely in their vaccination intention. In the present study, we examined (a) how people's vaccination intentions changed during the vaccination rollout and (b) whether changes in motivation (i.e.

View Article and Find Full Text PDF

Background: This vignette study explores which factors contribute to higher COVID-19 vaccination intentions.

Methods: Between the 4-11 January 2021, we recruited 15,901 Belgian citizens ( = 50.11 years, range 18-100) through convenience sampling to participate in a vignette study.

View Article and Find Full Text PDF

A significant trend of research construes conspiracy theories as a power challenging phenomenon. Yet, there is evidence that conspiracy theories are sometimes promoted by members of relatively powerful groups (e.g.

View Article and Find Full Text PDF

This contribution reports on the results of an uncontrolled longitudinal study investigating the effects of a Multi-Family Therapy (MFT) as treatment for adolescent Anorexia Nervosa (AN) and the role played by perceived family functioning in these effects. 150 patients (144 females) and their families took part in an MFT and were assessed at the beginning, middle, end of the therapy, as well as 6 and 12 months after the end of therapy. BMI, eating disorders symptomatology (EDI-II) and perceived family functioning (FAD) all improved over the time of MFT, and these benefits remained at both times of follow-up.

View Article and Find Full Text PDF

Introduction: Chiari I malformation (CM1) is an anatomical abnormality characterised by the cerebellar tonsils descending at least 5 mm below the foramen magnum. CM1 causes obstruction of cerebrospinal fluid (CSF) circulation as well as direct compression on the brainstem, thus causing typical consequences (syringomyelia), and typical clinical features (characteristic headaches and neurological impairment). Surgery is the only available treatment, indicated when symptomatology is present.

View Article and Find Full Text PDF

We agree that external validity of social psychological experiments is a concern, we disagree these models are useless. Experiments, reconsidered from a situated cognition perspective and non-linearly combined with other methods (qualitative and simulations) allow grasping decision dynamics beyond bias outcomes. Dynamic (vs.

View Article and Find Full Text PDF