Medical research is essential for advancing the understanding of health, diseases, and treatments. There are many types of studies that serve different purposes. Medical research, or health research, ...

Case-cohort study designs represent a cost-effective and efficient strategy for analysing time-to-event data, particularly when the event of interest is rare. By selecting a random subcohort along ...

The U.S. Food and Drug Administration (FDA) has recently issued guidance for sponsors and investigators interested in submitting a non-interventional study, commonly known as an observational study, ...