Real-World Evidence (RWE) in Clinical Trials and Why it Matters

Real-World Evidence (RWE) in Clinical Trials and Why it Matters


July 14, 2021


Marius | Chief Product Officer

As healthcare providers aim to focus increasingly on patient outcomes, companies are looking to new data sources which go beyond traditional randomized controlled trials (RCTs) to measure and demonstrate the value of patient treatments. Real-World Evidence has been used for several decades, but recent technological and analytical advances mean that it can be applied at a whole new level.


What are Real-World Evidence and Real-World Data? 

Clinical trials often don’t reflect the real world of drug delivery, which is a significant problem. Information about how patients really feel and function is often missing. At the same time, patient treatment cannot happen without clinical studies. Many experts therefore believe that the only way out of this problem is to use healthcare data which are available in massive quantities, so-called Real-World Data. In medicine, Real-World Evidence (RWE) refers to evidence which is gathered from Real-World Data (RWD) outside the context of RCTs. 

Real-World Evidence

RWE is clinical evidence on the use and potential benefits or risks of a medical product or drug derived from analysis of RWD. It provides valuable additional information to the pharmaceutical industry and its associated stakeholders, such as medical device manufacturers, authorities, health insurers and hospitals. It can include patient-reported outcomes (PROs) describing the impact of a treatment on patients’ quality of life, daily activities and symptoms, as well as clinical or economic outcomes. RWE comes into play when clinical trials cannot account for the entire patient population of a particular disease.

Real-World Data

RWD, on the other hand, is collected from observations of routine clinical practice in both prospective and retrospective ways. It is related to patient health status and/or health care, and is routinely collected from a variety of different sources which we will look at later. According to PharmaBoardroom, RWD make up 95% of patient data, while actual clinical trials make up just 5%.


Why does Real-World Evidence matter?

In contrast to clinical trials which usually have narrow, predefined patient criteria (e.g. only patients without pre-treatment), RWE includes all patients regardless of any specific criteria.


RWE helps medical professionals understand the real-world settings in which a drug, medical device or other treatment is applied, such as populations, care patterns and the actual burdens of a disease. Furthermore, it allows for the assessment of how effective a therapy is based on existing data, which helps physicians make better decisions. RWE is also a powerful way of refining or supplementing evidence from conventional clinical trials of new medicines. Finally, it provides new evidence of the effectiveness of new types of medical innovations on the market. 

Some of the advantages of RWE for different stakeholders include: 


Limitations of Real-World Evidence

Despite its many advantages, there are certain factors which need to be taken into account when gathering RWE: For one, RWE carries potential for bias, given that the real-world population is extremely diverse. Therefore, RWD sources must be a good representation of the population as a whole. Furthermore, the quality of data available in the real world can vary, and the quality might not be high enough to answer certain questions, e.g. a database might contain data on thousands of study subjects, but some could be missing information about the duration or dosage of their treatment. In an ideal setting, therefore, clinical trials and RWE can be used in combination, thus providing a more comprehensive understanding of a drug, treatment or device. This can offer powerful insights into the effectiveness of treatment and potential improvement strategies.


How is Real-World Evidence collected? 

There are a variety of ways of gathering RWE including:


Which criteria must be met for Real-World Evidence studies? 

There are six areas which need to be addressed when planning a RWE study.


Firstly, the data selected should help healthcare professionals to address specific regulatory affairs questions and provide sufficient information about exposure, covariates, and outcomes for the study purpose. The gathered data should represent patients with the target condition and have sufficient size to demonstrate the treatment’s benefit.

Common data model

Furthermore, when working with medical data across several databases, it is best to use a common data model with common terminologies and coding schemes across multiple sources.


Study coordinators and sponsors should consider whether the source of their data identifies patients of interest, outcomes of interest and covariants. They should also verify whether this data has been used in a RWE context before and whether there are enough patients of interest to support the study. Finally, the data’s completeness or any missing data must be taken into account. 


Another important aspect is transparency: In order to be acceptable, data transformation, source verification and auditing procedures for completeness and consistency must be transparent to all relevant parties involved.


Study coordinators must have access to a variety of RWD sources to fill any potential gaps in the data they are working with.


Finally, for the reporting aspect, it is crucial to follow reporting standards, and to document data elements and definitions, the method used for data aggregation, as well as the time windows in which the data was collected.


How Climedo Health can help you work with Real-World Evidence

As clinical study designs become increasingly complex, there is a growing demand for larger and more diverse pools of study participants. Given the convenience of remote and virtual data collection, decentralized clinical trials (DCTs) have the potential to improve patient recruitment, retention, and engagement, thus allowing for continuous data capture in real-world settings. For this reason, we at Climedo Health are on a mission to revolutionize post-marketing clinical trials in the context of Real-World-Evidence and Pharmacovigilance.

Our track record speaks for itself: 

What can companies achieve with our decentralized approach?


Want to find out more about how you can conduct clinical studies using RWE? Reach out to us for a demo or free trial! We look forward to hearing from you.


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Marius | Chief Product Officer

Marius | Chief Product Officer


Enthusiastic about empowering healthcare professionals with intelligent software solutions. Passionate about family and friends, digital health and sports.

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