Response rate (medicine)
In medicine, a response rate is the percentage of patients whose cancer shrinks or disappears after treatment. 
The FDA definition of ORR is "the proportion of patients with tumor size reduction of a predefined amount and for a minimum time period.":7
- "NCI Dictionary of Cancer Terms". National Cancer Institute. Retrieved 5 June 2016.
- Guidance for Industry Clinical Trial Endpoints for the Approval of Cancer Drugs and Biologics FDA
- Objective tumor response and RECIST criteria in cancer clinical trials
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