Real-world evidence (RWE) in clinical trials refers to data obtained from sources outside traditional clinical research settings, such as electronic health records, claims and billing data, patient registries, and wearable devices. By incorporating RWE into clinical trials, researchers can obtain a more comprehensive understanding of how treatments work in real-world scenarios beyond the controlled environment of a traditional trial. This allows for insights into factors such as patient demographics, co-morbidities, treatment adherence, and long-term outcomes that may not be captured in a lab setting. Utilizing RWE can help inform decisions around drug development, regulatory approvals, and healthcare policy-making by providing a more complete picture of treatment efficacy and safety. However, it is important to ensure the quality and reliability of RWE sources to maintain the integrity of the study findings.