RWD is crucial in epidemiology for several reasons. Firstly, it helps in understanding the actual effectiveness of treatments in diverse populations. Secondly, it assists in identifying and monitoring the safety of medications post-market. Thirdly, RWD can help in understanding the natural history of a disease, including its prevalence and incidence rates. Finally, RWD can support health policy decisions by providing evidence on the cost-effectiveness of interventions.
