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Updated: Jun 6, 2025

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
Published on: September 20, 2019
Real-world data: bridging the gap between clinical trials and practice.
Brooke E Wilson1,2,3, Christopher M Booth1,2
1Department of Oncology, Queen's University, Kingston, Ontario, Canada.
Real-world data (RWD) can complement randomized controlled trials (RCTs), but direct replication of efficacy is challenging due to inherent data differences. Novel trial designs may help bridge this gap.
Area of Science:
- Health Informatics
- Clinical Trials
- Real-World Evidence
Background:
- Randomized controlled trials (RCTs) provide high-quality drug efficacy evidence but can be impractical for rare diseases.
- Observational studies using real-world data (RWD) often fail to replicate RCT findings.
- Inherent differences exist between clinical trial data and real-world observational data.
Purpose of the Study:
- To explore the challenges associated with real-world data (RWD).
- To discuss considerations for clinicians, patients, and regulators when encountering conflicting efficacy and effectiveness data.
- To examine novel trial designs that could integrate RCTs and RWD.
Main Methods:
- This viewpoint discusses the challenges and potential of RWD in relation to RCTs.
- It analyzes the discordance between clinical trial efficacy and real-world effectiveness.
- Novel clinical trial designs are explored as a potential solution.
Main Results:
- Direct replication of clinical trial results using RWD has proven unsuccessful.
- RWD possesses independent value as a complementary evidence source to RCTs.
- Significant challenges exist in reconciling efficacy from RCTs with effectiveness from RWD.
Conclusions:
- RWD presents unique challenges and limitations when compared to RCTs.
- Clinicians, patients, and regulators must carefully consider discrepancies between trial efficacy and real-world effectiveness.
- Innovative trial designs are needed to effectively bridge the gap between traditional RCTs and RWD.
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