Outcome-dependent sampling designs are strategic methodologies in longitudinal research that prioritise the selection of study subjects based on observed outcomes. Rather than relying on random ...

Qualitative data captures information and concepts that cannot be easily described by numbers, to better understand a phenomenon of interest from different perspectives. This data may include people's ...

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, ...