Dec. 16, 2025
After a comprehensive review of OHDSI activities in 2025 on Dec. 9, the OHDSI community held its annual Holiday Farewell community call on Dec. 16. This session included a variety of activities, including:
• a game of “two publications and a hallucination”
• a LLM-aided game of “name that OHDSI collaborator/holiday character”
• the gift of gratitudes, handed out by the community
• a final look at 2025 … in song!
This will be the final community call of 2025. Calls will resume Jan. 13, and a new call invite will go out during the first week of January. The video presentation, along with accompanying slides, is available below.
Community Updates
• Congratulations to the team of Pawel Rajwa, Angelika Borkowetz, Thomas Abbott, Andrea Alberti, Katharina Beyer, Anders Bjartell, James T Brash, Andrew Chilelli, Eleanor Davies, Bertrand De Meulder, Tamas Fazekas, Asieh Golozar, Ayman Hijazy, Andreas Josefsson, Veeru Kasivisvanathan, Raivo Kolde, Daniel Kotik, Michael S Leapman, Marcin Miszczyk, Rossella Nicoletti, Peter Prinsen, Sebastiaan Remmers, Maria J Ribal, Juan Gómez Rivas, Lara Rodriguez-Sanchez, Monique J Roobol, Emma Smith, Robert Snijder, Carl Steinbeisser, Hein V Stroomberg, Giorgio Gandaglia, Philip Cornford, Susan Evans-Axelsson, James N’Dow, Peter-Paul M Willemse; and the PIONEER Consortium on the recent publication of Observational Health Data Analysis of the Cardiovascular Adverse Events of Systemic Treatment in Patients with Metastatic Hormone-sensitive Prostate Cancer: Big Data Analytics Using the PIONEER Platform in European Urology Focus.
• Congratulations to the team of Ka Hee Yoo, Kyung Joo Lee, Sang Min Lee, Changwoo Han, Rae Woong Park, and Young Tak Jo on the recent publication of Comparative effectiveness of selective serotonin reuptake inhibitors versus serotonin-norepinephrine reuptake inhibitors in the risk of diagnostic conversion from unipolar depression to bipolar disorder in the International Journal of Psychiatry in Clinical Practice.
• Konstantin Iaroshovets, in collaboration with the Vocabulary team, recently shared the OHDSI ATHENA User Survey. Please help the team learn what is requested to make Athena better by filling out this brief survey.
• 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.
• 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 136-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 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 OHDSI Global 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 — Preserving the DNA of Clinical Intent: Integrating IMO Health API services into OHDSI Extract-Transform-Load Process (Evan Sholle)
Tuesday — Prediction of Hyperuricemia and Its Association with Renal failure, Cardiovascular Prognosis in Adults with Type 2 Diabetes mellitus (Sujin Gan)
Wednesday — Real-World Treatment Pathways of Lung Cancer Patients in Taiwan: A Common Data Model Analysis Using TMUCRD (Nguyen Thi Kim Hien)
Thursday — Empowering Trial by Multi-source Multi-site Real-world Data: A Negative Control-Calibrated Digital Twin Approach (Dazheng Zhang)
Friday — How do changes in vocabulary mapping and database release versions affect cohort composition in real-world data? (Jill Hardin)
Slides
Holiday Farewell | Community Updates
Video Presentation
A Farewell to 2025, OHDSI Style
• a game of “two publications and a hallucination” (0:00)
• a LLM-aided game of “name that OHDSI collaborator/holiday character” (22:32)
• the gift of gratitudes, handed out by the community (43:54)
• a final look at 2025 … in song! (51:42)
