As interest in RWE continues to grow, the databases and research methodologies used to collect and analyze these data have become more sophisticated, both in the U.S. and in other countries, as healthcare researchers are gaining access to new, previously unavailable data. With these robust RWD sources, more insight-generating analyses can be conducted to help better inform healthcare decision making based on everyday patient outcomes. The use of RWE is also gaining the attention of and is currently being evaluated by regulatory agencies for potential use for labelling changes, supported either wholly, or in part, by RWE. For example, the U.S. Food and Drug Administration (FDA) created the FDA Real-World Evidence Program Framework to evaluate the use of RWE throughout the drug development process. Additionally, the European Medicines Agency (EMA) has recognized there are important questions that could potentially be investigated via RWD analyses, and has called for a learning healthcare system at the international level to help “realize the full potential of RWD.”
However, it is important to remember that observational RWD analyses are subject to limitations. For example, they can only evaluate association and not causality. Additionally, given RWD are collected from within a given healthcare system or hospital that may have practice patterns that vary from others, analyses must be interpreted within the context of the healthcare system in which the data were collected. Further, the information routinely collected within a given system or country may include more or less clinical detail than another system, which requires researchers to thoughtfully consider all available data and how to best address the research question of interest.
As the benefit of RWE stems from real-life clinical practice, and healthcare practices and patient demographics can vary from country to country, RWE can be relatable among providers in countries where the data was collected. Some countries have systematized data collection infrastructures, which means RWD analyses can include significant portions of the country’s population. For example, in the U.S., the Centers for Medicare and Medicaid Services includes a substantial number of Americans 65 and older; similarly, France has instituted a comprehensive RWD source that has the capability of producing analyses that represent some of the largest RWD studies in Europe.
Interestingly, researchers from different countries are also collaborating to expand beyond country-specific RWE collected from their own localized analyses. For example, a Nordic study comprised of Sweden, Norway, and Denmark pooled data from health systems across all three countries’ national registries for a more comprehensive, regional analysis. A combined analysis such as this provides helpful insights regarding treatment options in regions consisting of several countries and reveals the potential benefit of multi-country RWE to provide relatable insights to a greater number of providers, regardless of the country in which they practice.
The global expansion of RWD collection and use is a reflection of the growing trend among providers in applying RWE to everyday practice and highlights the important role RWE can play. While clinical trials remain the gold standard for evaluating the efficacy and safety of a treatment option, analyses of RWD complement clinical trial findings and can help fill knowledge gaps related to how a medication is used in real-world medical settings.