RT Journal Article SR Electronic T1 Blueprint for harmonising unstandardised disease registries to allow federated data analysis: prepare for the future JF ERJ Open Research JO erjor FD European Respiratory Society SP 00168-2022 DO 10.1183/23120541.00168-2022 VO 8 IS 4 A1 Johannes A. Kroes A1 Aruna T. Bansal A1 Emmanuelle Berret A1 Nils Christian A1 Andreas Kremer A1 Anna Alloni A1 Matteo Gabetta A1 Chris Marshall A1 Scott Wagers A1 Ratko Djukanovic A1 Celeste Porsbjerg A1 Dominique Hamerlijnck A1 Olivia Fulton A1 Anneke ten Brinke A1 Elisabeth H. Bel A1 Jacob K. Sont YR 2022 UL http://openres.ersjournals.com/content/8/4/00168-2022.abstract AB Real-world evidence from multinational disease registries is becoming increasingly important not only for confirming the results of randomised controlled trials, but also for identifying phenotypes, monitoring disease progression, predicting response to new drugs and early detection of rare side-effects. With new open-access technologies, it has become feasible to harmonise patient data from different disease registries and use it for data analysis without compromising privacy rules. Here, we provide a blueprint for how a clinical research collaboration can successfully use real-world data from existing disease registries to perform federated analyses. We describe how the European severe asthma clinical research collaboration SHARP (Severe Heterogeneous Asthma Research collaboration, Patient-centred) fulfilled the harmonisation process from nonstandardised clinical registry data to the Observational Medical Outcomes Partnership Common Data Model and built a strong network of collaborators from multiple disciplines and countries. The blueprint covers organisational, financial, conceptual, technical, analytical and research aspects, and discusses both the challenges and the lessons learned. All in all, setting up a federated data network is a complex process that requires thorough preparation, but above all, it is a worthwhile investment for all clinical research collaborations, especially in view of the emerging applications of artificial intelligence and federated learning.Harmonising real-world patient data from diverse registries to allow federated analyses is a complex process that requires thorough preparation but is above all a valuable investment, especially in view of emerging applications of artificial intelligence https://bit.ly/3NEKKnV