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P-Value Workshop

9 December 2025

EORTC HQ, Brussels, Belgium

Help us shape the next 100 years of statistical practice at EORTC. 

Celebrating the 100th anniversary of the p-value, EORTC is championing a new era of statistical rigor in oncology. 

Biostatistics is vital—as demonstrated by its role in the COVID-19 pandemic—but the field must evolve beyond the simple p-value rule. Following a focused expert workshop on 30 September 2025, we are ready to present solutions. 

Join the EORTC community online on 9 December for a critical meeting to discuss: 

  • The proper use and limitations of p-values.
  • How to better communicate uncertainty.
  • Establishing new standards for data interpretation.

This event aims to reach an agreement on new guidelines for a more nuanced and meaningful definition of 'scientific proof.' Your input is essential as we set the standard for evidence-based research. 

Date: 9 December
Time: 09:00-17:00CET
Location: Online

Programme

Time Title Presenter/ Speaker
09:00 Introduction: aims and objectives Murielle Mauer, EORTC
09:10 P-value: history, origins: “the 5% p-value: how we got where we are” Corneel Coens, EORTC
09:50 Different perspectives in clinical trials: how do people evaluate trial results? Clinician: Sjoukje Oosting, Netherlands
10:30 Different perspectives in clinical trials: how do people evaluate trial results? Editor: Alexia Iasonos, USA
11:10 Coffee Break
11:30 Different perspectives in clinical trials: how do people evaluate trial results? Patient: Erik Briers, Belgium
Jan Bogaerts, EORTC
Bert Dhondt, EORTC
12:10 Q&A
12:25 EORTC P-Value Day 1: Consensus Summary Emma Hall, UK
13:00 Lunch
13:45 Panel Discussion Consensus All Speakers
Regulator: Elina Asikanius, Finland
14:30 p-value: how to use it? What do clinicians consider clinically important + how to evaluate uncertainty Gabe Sonke, Netherlands
15:05 Statistical Significance vs. Clinical Significance

  • Difference between statistical significance and clinical importance
  • How can we measure/quantify clinical importance
  • When are study results practice changing, a view from MCBS
 Elisabeth de Vries, Netherlands
15:40 Coffee Break
15:55 Closing Panel Discussion All
16:45 Summary Emma Hall, UK
17:00 Close

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