Revolutionizing Real-World Evidence practices in Europe
Revolutionizing Real-World Evidence practices in Europe
GREG’s aim
The GREG project creates, tests, and shares practical, evidence-based guidance and tools to help generate and use Real-World Evidence (RWE). By improving how RWE informs the development and evaluation of medicines, medical devices, and drug-device combinations, GREG supports better decision-making for regulators and Health Technology Assessment (HTA) bodies.

GREG’s impact
- Better informed decision-making using Real-World Data (RWD) and Real-World Evidence (RWE) contributing to a better allocation of resources towards safe and effective innovations.
- Faster market entry for safe and effective medicinal products, devices, and combinations.
- Improved access to healthcare technologies and innovations to meet the needs of patients and of the diverse European healthcare systems.

Latest news
Milan, 29 August - 02 September 2026
Bringing together researchers, regulators, industry representatives, healthcare professionals, and patient-focused organisations from around the world, the 42nd International Society for Pharmacoepidemiology (ISPE) Annual Meeting provided a unique opportunity to exchange knowledge and discuss the future of pharmacoepidemiology and Real-World Evidence...
WP2 – RWE for Regulatory Decision-Making
WP2 is where regulatory science meets real-world practice. Co-Led by the University of Oxford, University of Edinburgh and Bayer, this work package engages regulators and stakeholders to co-create evidence-based best practice recommendations as well as tools for using Real-World Data...
Issue 2 - June 2026
The GREG Consortium together for the first General Assembly (GA) in Copenhagen, Denmark - May 2026 Welcome back to the GREG Newsletter! Having reached the first anniversary of project launch, we’d like to give you an update on progress, achievements...
WP3 – RWE for Health Technology Assessment (HTA)
Led by NICE (UK) and co-led by Medtronic, WP3 collaborates with Health Technology Assessment (HTA) bodies, payers, and industry to bridge the gap between Real-World Data (RWD) and its application in HTA, improving decision-making for medicines, medical devices, and drug-device...
WP1 - Evidence-Based Practical Guidance for the Use of Real-World Data in Evidence Generation for HTA and Regulatory Decision-Making
WP1 is the foundation of GREG, leading the co-creation of evidence-based practical guidance for the use of real-world data (RWD) and real-world evidence (RWE) in regulatory and health technology assessment (HTA) decision-making. Led by the Aragonese Institute of Health Sciences...
Sevilla, Spain, 02-04.06.2026
The IHI-GREG project is excited to present a session at the upcoming in-person Patient Engagement Open Forum (PEOF), focusing on Real-World Data (RWD) and Real-World Evidence (RWE). This interactive workshop-style session will explore how to bridge knowledge gaps, build capacity...
Copenhagen 6-7th May 2026
Last week GREG held its annual Consortium Meeting in Copenhagen on 6–7th May 2026, bringing together partners from across the project to review progress, align on next steps, and strengthen collaboration. The meeting opened with an overview of achievements to...
Rotterdam, 20th April 2026
At the beginning of this week, GREG returned to Rotterdam for another international meeting, this time presenting at the OHDSI Europe Symposium 2026. This event brings together global leaders in health data science, Real-World Evidence (RWE), and open-source collaboration. It was an excellent opportunity...
Rotterdam, 24-26th March 2026
Daniel Prieto-Alhambra (Erasmus MC), Tara Srouji (Novo Nordisk), and Annika Jödicke (University of Oxford) GREG’s Project Coordinator, Daniel Prieto-Alhambra, and Academic Co-Lead Annika Jödicke, took the stage at DIA Europe 2026 to present the project’s groundbreaking approach to real-world evidence...
The first successful Health Technology Assessment (HTA) Expert Forum meeting was held virtually on 23 February 2026.
The meeting included 14 HTA experts that assess Real-World Evidence (RWE) submissions, generate national RWE to inform local pricing and reimbursement decisions, or work at a policy level to support RWE developments in HTA. These experts from across Europe and...
Issue 1 - February 2026
As coordinators of the GREG project, we are thrilled to share the first edition of the GREG Newsletter with you. These newsletters will be published bi-annually and provide regular updates including progress of the project, achievements and upcoming events. In...
Real-world evidence and the GREG initiative – bridging regulation and data innovation in cardiology
The GREG Consortium has taken part in the European Society of Cardiology (ESC) annual Congress, held in Madrid from August 29 to September 1, 2025. This event continues to be a cornerstone in the global cardiology calendar, bringing together thought...
The Start of a Journey
The GREG project officially commenced with a two-day Kick-Off Meeting held in Rotterdam on 14–15 May, where around 80 participants from academia, industry, regulatory bodies, and patient organisations took part. Supported by the Innovative Health Initiative (IHI JU), GREG aims...
Generate, pilot-test, and disseminate evidence-based guidance and tools for the use of RWE
The GREG project has been officially launched to address persistent challenges in the generation, implementation, and acceptance of Real-World Evidence (RWE) for medicines, medical devices, and drug-device combinations in Europe. The GREG Initiative Will Tackle Persistent Challenges in Real-World Evidence...