Webinaires méthodologiques des groupes Cochrane européens

Lors de ces webinaires méthodologiques "Spotlight on Methods" d'une heure, des experts présentent des thématiques spécifiques relatives aux méthodes de synthèse des données probantes, en mettant l'accent sur les nouvelles méthodes et les développements récents. Tour à tour, les thèmes et les intervenant·es sont sélectionné·es par un groupe Cochrane européen. Ces webinaires offrent également un espace de discussion et d'échange d'idées sur les défis méthodologiques actuels liés aux revues.

  • Ces webinaires sont gratuits et uniquement en anglais
  • Zoom est utilisé - plus d'information ici
  • L'inscription est obligatoire 
     

Prochain webinaire :

  • 21 avril, 14:30–15:30 CEST (13:30-14:30 France)
"Assessing the Certainty of the Evidence by Means of Absolute Estimates of Effect: the New GRADE Approach"
par Silvia Minozzi (MD, MSc) & Francesco Nonino (MD, MSc) de Cochrane Italy
 
According to the new GRADE approach, "Certainty of the Evidence" refers to the confidence that effect estimates fall within a specific range or above a particular absolute threshold of interest.
The new GRADE GUIDANCE recommends to predefine decisional thresholds to determine trivial, small, moderate, and large effects (desirable as well as undesirable). These values are developed by determining an outcome-specific expected utility values and combining it with an empirically derived generic coefficient. The new GRADE method will allow systematic review authors assessing imprecision of any effect estimate by evaluating how its absolute value and its confidence intervals relate to predefined outcome-specific decisional thresholds, therefore moving forward from a limited, non-contextualised framework where imprecision was only assessed in relation to the null effect.
The webinar will address the theoretical framework by illustrating the GRADE guidance  42 (Wojtek et al 2025) and its application in a recently submitted Cochrane review of effect on disease-modifying treatments for Alzheimer’s disease.

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Webinaires à venir 

  • 20 mai, 13:00–14:00 CEST (12:00-13:00 France) "Dissemination bias" par Dr. Ingrid Töws de Cochrane Norway
    Selective non-dissemination of qualitative research findings can distort the evidence base for decision-making. Within the GRADE-CERQual approach, dissemination bias is recognised as a potential threat to confidence in qualitative evidence syntheses, but we still lack practical guidance on how to identify and assess it. This webinar presents on what we know about the issue so far and aims to sensitise reviewers for the potential dissemination bias in their qualitative evidence syntheses. 
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  • 10 juin, 15:00–16:00 CEST (14:00-15:00 France) "Trustworthiness beyond traditional bias domains" par Sally Yaacoub (BS Pharm, MPH, PhD) de Cochrane France
    Perceived trustworthiness of research may be influenced by factors beyond the traditional bias domains, including study-related characteristics, research context, and external circumstances. Identifying these factors is essential for gauging the credibility of non-randomized studies of interventions (NRSIs) as they are interpreted and used in systematic reviews, and for improving their design to ensure that they provide reliable evidence for decision-making. We will present findings from a survey of international experts and a scoping review of the literature that identified factors that influence the trustworthiness of NRSIs. These factors will provide a foundation for developing tools to improve NRSIs, ultimately strengthening evidence-based decision-making.
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Vidéos des webinaires passés

"Too good to be true – Spotting problematic trials in systematic reviews" (26 février 2026) par Dr. Jack Wilkinson de Cochrane Ireland
Systematic reviews of randomized controlled trials (RCTs) aim to include all eligible studies in evidence synthesis. Unfortunately, it is now clear that many systematic reviews contain so-called problematic studies. A study could be problematic due to research misconduct (including falsification or fabrication of data) or otherwise due to critical errors. Regardless of the reason for the problems, it is important to identify and remove these studies from systematic reviews to prevent them from influencing healthcare decisions. The INSPECT-SR (INveStigating ProblEmatic Clinical Trials in Systematic Reviews) tool has been developed for the purpose of assessing trustworthiness of RCTs in order to identify problematic trials. This interactive webinar introduced the INSPECT-SR tool by way of application to a published clinical trial. Participants had the opportunity to use INSPECT-SR to perform trustworthiness checks themselves and will learn how the tool can be incorporated when undertaking a systematic review.

 

"Risk of bias assessment using ROBUST-RCT" (18 mars 2026) par Prof. Dr. Matthias Briel de Cochrane Austria

 

 

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Contact en cas de problème/question avec ces webinaires : Cochrane Germany, workshops@cochrane.de