Disease-Specific Survival (DSS) refers to deaths caused specifically by a particular disease. At this point, there is concern whether the cause of death is directly attributable to the specific disease. If it is not caused by the specific disease, it is not included in the outcome index. The DSS can successfully reflect the clinical benefits of a specific disease, and show whether deaths caused by the specific disease have decreased or increased. However, the cause of death in patients is often unclear, requiring professionals to analyze.