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Event-free survival
Pronunciation
Definition 1
In cancer, the length of time after primary treatment for a cancer ends that the patient remains free of certain complications or events that the treatment was intended to prevent or delay. These events may include the return of the cancer or the onset of certain symptoms, such as bone pain from cancer that has spread to the bone. In a clinical trial, measuring the event-free survival is one way to see how well a new treatment works. Also called EFS. (NCI Dictionary)
Definition 2
The length of time after treatment during which a patient survives with no sign of a particular complication of disease. (NCI Thesaurus)
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