André Berchtold

ORCID: 0000-0002-0711-2254
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About
Contact & Profiles
Research Areas
  • Bayesian Methods and Mixture Models
  • Cannabis and Cannabinoid Research
  • Impact of Technology on Adolescents
  • Statistical Methods and Bayesian Inference
  • Child Development and Digital Technology
  • Adolescent and Pediatric Healthcare
  • Childhood Cancer Survivors' Quality of Life
  • Substance Abuse Treatment and Outcomes
  • Sexuality, Behavior, and Technology
  • Smoking Behavior and Cessation
  • Obesity, Physical Activity, Diet
  • Eating Disorders and Behaviors
  • Gambling Behavior and Treatments
  • Dementia and Cognitive Impairment Research
  • Child and Adolescent Psychosocial and Emotional Development
  • Health disparities and outcomes
  • Gender, Feminism, and Media
  • Social Media and Politics
  • Adolescent Sexual and Reproductive Health
  • Health Systems, Economic Evaluations, Quality of Life
  • Family Support in Illness
  • Survey Methodology and Nonresponse
  • Bullying, Victimization, and Aggression
  • Frailty in Older Adults
  • Statistical Methods and Inference

University of Lausanne
2015-2024

Institute of Social and Preventive Medicine
2008-2023

FORS – Swiss Centre of Expertise in the Social Sciences
2014-2022

HES-SO University of Applied Sciences and Arts Western Switzerland
2021-2022

Karolinska Institutet
2022

University Hospital of Lausanne
2007-2012

University of Zurich
2012

University of Bern
2008

Federal Office of Public Health
2008

Repubblica e Cantone Ticino
2008

Test–retest is a concept that routinely evaluated during the validation phase of many measurement tools. However, this term covers at least two related but very different concepts: reliability and agreement. Reliability ability measure applied twice upon same respondents to produce ranking on both occasions. Agreement requires tool exact values. An analysis research papers showed distinction between concepts remains anything clear, current practice evaluate only, generally basis sole...

10.1177/2059799116672875 article EN cc-by-nc Methodological Innovations 2016-01-01

The mixture transition distribution model (MTD) was introduced in 1985 by Raftery for the modeling of high-order Markov chains with a finite state space. Since then it has been generalized and successfully applied to range situations, including analysis wind directions, DNA sequences social behavior. Here we review MTD developments since 1985. We first introduce basic principle present several extensions, general spaces spatial statistics. Following that, methods estimating parameters....

10.1214/ss/1042727943 article EN Statistical Science 2002-08-01

To examine the relationship between different Internet-use intensities and adolescent mental somatic health.Data were drawn from 2002 Swiss Multicenter Adolescent Survey on Health, a nationally representative survey of adolescents aged 16 to 20 years in post-mandatory school. From self-administered anonymous questionnaire, 3906 boys 3305 girls categorized into 4 groups according their intensity Internet use: heavy users (HIUs; >2 hours/day), regular (RIUs; several days per week ≤ 2...

10.1542/peds.2010-1235 article EN PEDIATRICS 2011-01-18

Abstract Aim This study examined whether problematic Internet use was associated with substance among young adolescents and assessed this association accounted for the of tobacco, alcohol, cannabis other drugs. Methods Using Addiction Test, we divided a representative sample 3067 in Switzerland (mean age 14 years) into regular users. We performed bivariate analysis two logistic regression models, to analyse substances separately simultaneously, developed log‐linear model define associations...

10.1111/apa.12971 article EN Acta Paediatrica 2015-02-07

A series of four experiments investigated preschoolers' abilities to make sense dominance relations. Experiments 1 and 2 showed that as early 3 years old, preschoolers are able infer not only from physical supremacy but also decision power, age, resources. 4 have expectations regarding the ways in which a dominant subordinate individual likely differ. In particular, they expect an who imposes his choice on another will exhibit higher competence games more

10.1080/15248372.2014.926269 article EN Journal of Cognition and Development 2014-07-22

To compare the prevalence and intensity of victimisation from bullying characteristics victim bullying, comparing adolescents with without chronic conditions (CC).School survey.Postmandatory schools.A total 7005 students (48% females) aged 16-20 years, distributed into CC (728, 50% controls (6277, 48% females). Chronic condition was defined as having a disease and/or physical disability.Prevalence bullying-intensity bullying-and sociodemographic, biopsychosocial, familial, school violence...

10.1136/adc.2008.146571 article EN Archives of Disease in Childhood 2009-03-22

In the past two decades, iconography of victimhood mobilized by child rights advocates has changed significantly. particular, victim violence replaced street as dominant icon on international agenda. Based data from more than 300 documents produced between 1989 and 2009 interviews with leading advocates, this article explores diverging trajectories iconic victims. It follows traces successive translations idea ‘stolen childhood’ locates them against backdrop evolutions in children’s field.

10.1177/0907568213481816 article EN Childhood 2013-04-09

Evidence-based and reliable measures of addictive disorders are needed in general population-based assessments. One study suggested that heavy use over time (UOT) should be used instead self-reported addiction scales (AS). This compared UOT AS regarding video gaming internet empirically, using associations with comorbid factors.Cross-sectional data from the 2011 French Survey on Health Consumption Call-up Preparation for Defence-Day (ESCAPAD), cross-sectional 2012 Swiss ado@internet.ch two...

10.1111/add.13192 article EN Addiction 2015-10-09

The purpose of this article is to identify tobacco and cannabis co-consumptions consumers' perceptions each substance. A qualitative research including 22 youths (14 males) aged 15-21 years in seven individual interviews five focus groups. Discussions were recorded, transcribed verbatim transferred Atlas.ti software for narrative analysis. main consumption mode cigarettes which always mix tobacco. Participants perceive much more positively than tobacco, considered unnatural, harmful...

10.1093/her/cyp027 article EN Health Education Research 2009-06-10

OBJECTIVE: To assess whether problematic internet use is associated with somatic complaints and this association remains when checking for activity among a random sample of adolescents living in the canton Vaud, Switzerland. METHODS: Cross-sectional survey 3,067 8th graders (50.3% females) divided into average (n = 2,708) 359) Internet users compared (backache, overweight, headaches, musculoskeletal pain, sleep problems sight problems) controlling sociodemographic internet-related variables....

10.4414/smw.2014.14061 article EN cc-by Schweizerische medizinische Wochenschrift 2014-12-04

<h3>Background</h3> Among young people, about one in three females and five males report experiencing emotional distress but 65–95% of them do not receive help from health professionals. <h3>Aim</h3> To assess the differences among people who seek those for their psychological problems, considering frequency consultations to GP social resources. <h3>Design study</h3> School survey. <h3>Setting</h3> Post-mandatory school. <h3>Method</h3> a Swiss national representative sample 7429 students...

10.3399/bjgp09x454115 article EN British Journal of General Practice 2009-08-29

Using a sample of octogenarians from the Swiss Interdisciplinary Longitudinal Study on Oldest Old, authors investigated predictive validity an expanded working definition frailty based deficiencies in mobility, memory, energy, and physical or sensory capacities analyzed resulting health transitions. The five domains were considered as predictors onset dependence activities daily living (ADLs) death using logistic multilevel Cox survival regression models. Health transitions studied with...

10.1177/0164027507312115 article EN Research on Aging 2008-02-01
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