WEEKLY COMMUNITY CALL MEETING
Phenotype Aphril has begun! Please join our April 7 (11 am ET) community call for a session focused on phenotype development. Gowtham Rao will lead this session with a demo that highlights the process of building phenotype cohorts in ATLAS.
Everybody is invited. If you didn’t receive a call invite, please use this link to join. The call schedule and previous recordings can be found on the community calls page.
Community Updates
• Congratulations to the team of Seokyoung Song, Hyungseok Seo, Il Seok Kim, Minsoo Kim, Lim Youn Hee, Jung Eun Kim, Soo Il Choi, Dong Hyuck Kim, Young Hun Lee, Moonki Park, Jong Bum Choi, Cheolhyeong Lee, Seung Hee Yoo, Ho Kyung Yu, Chan Noh, Seong Young Choi, Sang Gyu Kwak on the recent publication of A Multicenter Propensity Score-Matched Cohort Study of Preoperative Antiplatelet Therapy and Postoperative Outcomes in Elderly Surgical Patients in medicina.
WEEKLY WORKING GROUP MEETINGS
Upcoming Workgroup Calls – OHDSI
OHDSI SHOUTOUTS
Congratulations to the team of Jong-Ho Kim, Youngho Seo, Seung Yong Shin, Eung Ju Kim, Kap Su Han, Hyung Joon Joo on the recent publication of Temporal Trends and Clinical Implications of Cardiac Troponin Testing in Emergency Departments: A Multicenter Retrospective Study in the Journal of Clinical Medicine.
• Congratulations to the team of Mike Du, Albert Prats-Uribe, Núria Mercadé-Besora, Kim Lopez-Guell, Yuchen Guo, Marta Alcalde-Herraiz, Xihang Chen, Antonella Delmestri, Wai Yi Man, Talita Duarte-Salles, Anna Palomar, Agustina Giuliodori, Emanuel Brađašević, Antea Jezidžić, Elvira Bräuner, Susanne Bruun, Katia Verhamme, Mees Mosseveld, James T Brash, Dina Vojinovic, Isabella Kaczmarczyk, Akram Mendez, Peter Rijnbeek, Daniel Prieto-Alhambra, Edward Burn, and Martí Català on the recent publication of CohortCharacteristics: an R package for population characterisation in observational studies using the OMOP common data model in the European Journal of Epidemiology.
OHDSI UPDATES
Registration and the call for participation are now open for the 2026 OHDSI Global Symposium, held Oct. 20–22 at the Hyatt Regency in New Brunswick, N.J. Check the Global Symposium section of this newsletter to learn more about our 12 new tutorial offerings.
• The first OHDSI Latin America Symposium will be held July 30-31 in Salvador, Brazil. The event will include multiple workshops, including sessions focused on Introduction to OMOP, Cohort building, ETL for OMOP, and Scientific collaboration: opportunities for network studies in Latin America. Please help the organizing committee find relevant stakeholders to represent the region; reach out to [email protected] or [email protected] to provide assistance.
• Ready to turn your data harmonization vision into reality? Join The OMOP School in Stockholm, Sweden May 26-29 for a hands-on bootcamp designed to help you master the OMOP Common Data Model and execute end-to-end mini-harmonization projects. Whether you are a data scientist, researcher, or health data custodian, this intensive workshop provides the actionable tools and OHDSI methods needed to transform your institutional research capabilities.
• The second OHDSI Maternal Health Fellowship is designed to train clinical investigators for improved maternal and neonatal care. This fellowship offers three key components: Career Development, Practice, and Networking. Supported by both the OHDSI community and the NIH IMPROVE initiative, the program focuses on training clinical investigators in observational research methods to enable them to conduct reproducible research and generate real-world evidence. Learn more and register here.
• The OHDSI community has published more than 950 peer-review studies highlighting the OMOP CDM or OHDSI tools. Learn more about OHDSI research via our improved Community Dashboard. Thank you to our collaborators at Johns Hopkins for leading this initiative.
• 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.
OHDSI SOCIAL SHOWCASE
• Research from the 2025 Global Symposium Collaborator Showcase is being shared daily on OHDSI’s LinkedIn, Twitter/X, Instagram and Bluesky social channels as part of the #OHDSISocialShowcase. Below are posters (with study leads) that are featured this week:
Monday — Building a perfect special-purpose healthcare data model: learning from and assessing OMOP (Vojtech Huser)
Tuesday — Mapping Survey Data to OMOP: The Current State and Available Resources (Nicole M. Gerlanc)
Wednesday — Use of CohortDiagnostics for evaluating a phenotype of acute-on-chronic hepatic failure (Alexandra Buergler)
Thursday — Advancing Learning Health Systems Through Integrated Machine Learning Operations: A Novel Extension of the OHDSI Research Infrastructure (Boudewijn Aasman)
Friday — Causal Learning with Large-Scale Propensity Scores to Predict Treatment Outcomes: A Study of Bipolar disorder in Adults with Attention-deficit/hyperactivity disorder (Junhyuk Chang)
UPCOMING OHDSI EVENTS
The 2026 OHDSI Europe Symposium will be held April 18-20 in Rotterdam, Netherlands, and registration is open. The current agenda and registration info are both available on the event homepage.
• The first OHDSI Latin America Symposium will be held July 30-31 in Salvador, Brazil. The event will include multiple workshops, including sessions focused on Introduction to OMOP, Cohort building, ETL for OMOP, and Scientific collaboration: opportunities for network studies in Latin America.
• The UK Symposium will be held September 18 at the University of Nottingham, preceded by an OMOP Training Day on September 17. The call for abstracts has opened, and the deadline is set for May 1.
• Registration and the call for participation are now open for the 2026 OHDSI Global Symposium, held Oct. 20–22 at the Hyatt Regency in New Brunswick, N.J. Check the Global Symposium section of this newsletter to learn more about our 12 new tutorial offerings.
Book Your Hyatt Regency Guestroom Here–
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Please continue to collaborate in our MS Teams environment, check out the OHDSI website and forums , and follow us on all platforms, including Twitter and LinkedIn to get continued updates and information on everything happening in our community
