Dec. 2, 2025
The OHDSI community has published more than 900 studies over more than a decade, and lead authors from four different recent publications joined the Dec. 2 community call to briefly present their study.
Ágota Mészáros • PhD Student, Semmelweis University
Semiautomatic mapping of a national drug terminology to standardised OMOP drug concepts using publicly available supplementary information (BMC Medical Research Methodology)
Marta Pineda Moncusí • Postdoctoral Researcher in Health Data, University of Oxford
Changes in use and utilisation patterns of drugs with reported shortages between 2010 and 2024 in Europe and North America: a network cohort study (The Lancet Public Health)
Lucía Bellas • Real World Evidence Epidemiologist, IMI_EHDEN
Secular Trends in the Use of Valproate-Containing Medicines in Women of Childbearing Age in Europe: A Multinational DARWIN EU Network Study (Pharmacoepidemiology & Drug Safety)
Hanieh Razzaghi • Associate Director, PEDSnet Data Coordinating Center
A multifaceted approach to advancing data quality and fitness standards in multi-institutional networks (JAMIA)
Community Updates
• Congratulations to the team of Gyu Lee Kim, Yu Hyeon Yi, Jeong Gyu Lee, Young Jin Tak, Seung Hun Lee, Young Jin Ra, Byung Kwan Choi, Sang Yeoup Lee, Young Hye Cho, Eun Ju Park, Youngin Lee, Jung In Choi, Sae Rom Lee, Ryuk Jun Kwon, and Soo Min Son on the recent publication of Association Between the Use of DPP4 Inhibitors and Metformin and the Risk of Cancer in Patients with Type 2 Diabetes: A Multicenter Retrospective Cohort Study Using the OMOP CDM Database in Cancers.
• The 12th annual OHDSI Global Symposium will return to the Hyatt Regency Hotel in New Brunswick, N.J., Oct. 20-22, 2026. All pertinent information will be added to this page when available. Currently, the OHDSI steering group is seeking proposals for both plenaries and tutorials. The deadline for both is January 30, 2026; more details are available on the event homepage.
• The December edition of the OHDSI newsletter is now available. This includes information on five in-person OHDSI events across four continents that are taking place over the last two months of the year, as well as recent community updates, recent publications and presentations, and plenty more.
• Hua Xu is a well-known researcher in clinical natural language processing (NLP), and he leads the OHDSI NLP workgroup. He has developed novel algorithms for important clinical NLP tasks such as entity recognition and relation extraction, which have been top ranked in over a dozen of international biomedical NLP challenges. His lab has developed CLAMP, a comprehensive clinical NLP toolkit that has been successfully commercialized and used by hundreds of healthcare organizations. In the latest OHDSI Collaborator Spotlight, Hua reflects on his career journey, work being done at Yale, how NLP impacts the OHDSI mission of generating real-world evidence that impacts healthcare, and more.
• There is a new tutorials homepage on OHDSI.org that hosts all tutorials from past Global/US Symposia, including all six tutorials from the recent Global Symposium.
• The latest “On The Journey” annual report is now on the OHDSI homepage. This 134-page PDF provides an overview of the OHDSI community, including a look at its collaborators and collaborative activities, its research areas and tools, its work with standardized data and vocabularies, and nearly 900 publications that have come from the community.
• Registration is now open for the 2026 Summer School in Observational Health Data Science & Informatics, AI, and Real World Evidence, which will be held June 22-26 at the Columbia University Department of Biomedical Informatics. Now in its second-year, the Columbia OHDSI Summer School provides health professionals, researchers, and industry practitioners with an immersive, hands-on training to working with real-world health data and generating real-world evidence (RWE). Participants will explore the types of healthcare data captured during routine clinical care—such as electronic health records and administrative claims—and learn how to standardize these data using the OMOP Common Data Model to support collaborative, distributed research as part of a data network.
• Early-bird registration is open for the Oxford Summer School 2026: Real World Evidence using the OMOP Common Data Model, which will also be held June 22-26. This Real World Evidence Summer School will provide participants with the tools and concepts necessary to plan and execute Real World Evidence studies, with a focus on the use of the OMOP common data model. The course will have morning lectures followed by afternoon practicals where concepts discussed in the morning will be put in practice with hands-on sessions.
Save The Dates
- The 2025 OHDSI Asia-Pacific Symposium will be held Dec. 6-7 in Shanghai, China. Registration is open, and agenda details will be shared when available.
- The 2026 OHDSI Europe Symposium will be held April 18-20 in Rotterdam, Netherlands. While registration has not opened yet, the deadline for abstract submissions is Feb. 6, 2026.
- The 2026 OHDSI Global Symposium will be held Oct. 20-22 at the Hyatt Regency Hotel in New Brunswick, N.J.
OHDSI Social Showcase
• Research from the 2025 Europe Symposium Collaborator Showcase is also being shared daily on OHDSI’s LinkedIn, Twitter/X, Instagram and Bluesky feeds as part of the #OHDSISocialShowcase. Below are posters (with study leads) that are featured this week:
Monday — AI-Driven Precision: Semantic Search and Smart LLM Reranking for Mapping Croatian Medical Concepts to OMOP-CDM (Karlo Pintarić)
Tuesday — edenceMapper: Mapping Suggestion Framework for Non-Standard to Standard Codes (Freija Descamps)
Wednesday — Federated Platform for Clinical Data Mediation: Enhancing Interoperability with OMOP and NLP (Mónica Arrúe)
Thursday — OHDSI-in-a-File: A Self-Contained Browser-Based Notebook for Research (Pedro Campos)
Friday — Searching the HMA-EMA Real-World Data Catalogues: Insights into Common Data Models (Elpida Kontsioti)
Slides
Meszaros | Moncusi | Bellas | Razzaghi | Community Updates
Video Presentations
Semiautomatic mapping of a national drug terminology to standardised OMOP drug concepts using publicly available supplementary information (Ágota Mészáros)
https://youtu.be/7V1Ss00A0e8
Changes in use and utilisation patterns of drugs with reported shortages between 2010 and 2024 in Europe and North America: a network cohort study (Marta Pineda Moncusí)
https://youtu.be/aHmja3HAuT0
Secular Trends in the Use of Valproate-Containing Medicines in Women of Childbearing Age in Europe: A Multinational DARWIN EU Network Study (Lucia Bellas)
https://youtu.be/mjb_mPHwfQ4
A multifaceted approach to advancing data quality and fitness standards in multi-institutional networks (Hanieh Razzaghi)
https://youtu.be/SgenIiFa0oA
