Symposium 2026

Welcome, Intro to OHDSI

Opening remarks and introduction to OHDSI, setting the stage for the 2026 European symposium and the themes of collaboration, community, and evidence generation.

Collaborator Showcase Talks

A rapid and diverse series of presentations highlighting current OHDSI-related work, methods, tools, and applications from collaborators across the community.

Dreaming About The Journey Ahead

A forward-looking session focused on vision, future directions, community growth, and the next steps for living evidence generation in Europe.

Journeys of the Titans

Reflections and experiences from major contributors and leaders in the OHDSI ecosystem, highlighting lessons learned and long-term perspectives.

National Nodes

Updates and perspectives from national OHDSI nodes across Europe, showing progress, local implementation, collaboration models, and future opportunities.

The Oh! Factor

A session centered on the distinctive community spirit, collaboration dynamics, and practical ingredients that help OHDSI projects succeed.

Closing

The closing session wrapped up the symposium with final reflections, acknowledgements, and an invitation to continue the journey beyond Rotterdam.

Introduction to OHDSI

Led by: Julia Kurps (The Hyve), Laura Verbeij & Fleur Vereijken (Erasmus MC).

Introductory tutorial covering the history and philosophy behind OHDSI, the community structure, OMOP CDM, OHDSI tools, requirements for using the tools, and learning pathways into OHDSI.

Target audience: Newcomers to OHDSI, data standards, open science, and clinical evidence generation.

ETL Development and Updating

Led by: Maxim Moinat (Erasmus MC), Anne van Winzum, Stefan Payralbe (The Hyve).

Workshop on OMOP ETL conventions, implementation examples, recent ETL and mapping tooling developments, and best practices for maintaining ETL pipelines after deployment.

Target audience: Data engineers, ETL developers, and data holders managing OMOP CDM conversions.

Phenotyping in OHDSI: Pipelines, Steps & Tools

Led by: Anna Ostropolets (J&J), Maria Khitrun, Azza Shoaibi, Dmitro Dymshyts, Anna Saura Lázaro.

Workshop on phenotyping pipelines in OHDSI, clinical concept development, literature review, concept sets, phenotype definition tools, evaluation, validation, and maintenance across vocabulary versions.

Target audience: Researchers designing studies and building phenotypes in OHDSI.

Data Quality Assessment Framework & Tools

Led by: Clair Blacketer, Anthony Sena (J&J).

Workshop on the Data Quality Dashboard, DQD updates, hands-on ETL validation, identifying and resolving ETL issues, and data quality in network studies.

Target audience: Anyone responsible for OMOP CDM data quality and ETL validation.