<unk>  <unk>  is "the length of time during and after the treatment of a disease, such as cancer, that a patient lives with the disease but it does not get worse". In oncology,<unk>  usually refers to situations in which a tumor is present, as demonstrated by laboratory testing, radiologic testing, or clinically. Similarly, "disease-free<unk> " is the length of time after patients have received treatment and have no detectable disease. Time to<unk>  (TTP) does not count patients who die from other causes but is otherwise a close equivalent to<unk>  (unless there are many such events). The FDA gives separate definitions and prefers<unk> .
Progression-free survival
Five-year survival rate
Natural history of disease
Minimal residual disease
Survival rate
Post-transplant survival measure
Toxicity class
Immune-related response criteria