Survival rate refers to the percentage or proportion of individuals who survive a particular event, condition or treatment. In cancer research, it is often used in reference to the number of patients who are still alive after a certain period of time following their diagnosis and/or treatment for cancer. The survival rates can be calculated based on different factors such as stage of disease at diagnosis, type of cancer, age, sex or other demographic characteristics, and the effectiveness of specific treatments. Survival rates provide valuable information to patients, doctors, researchers, and policymakers about the success of various treatment options and can help guide decisions about patient care.